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Journal articles on the topic 'Maximum wavelength'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Belov, M. L., A. A. Samsonova, P. A. Filimonov, S. E. Ivanov, and V. A. Gorodnichev. "Comparative Analysis of Aerosol Lidar Potential Possibilities to Measure Wind Speed in Different Spectral Ranges." Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 1 (138) (March 2022): 49–61. http://dx.doi.org/10.18698/0236-3933-2022-1-49-61.

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Results are provided of a study devoted to the atmosphere optical state influence on the wind aerosol lidar sensing range and comparison of range estimates obtained for different sensing wavelengths in ultraviolet, visible and near-infrared ranges. It is demonstrated that the aerosol lidar sensing range significantly depends on the Earth atmosphere optical state. The maximum laser sensing range is realized at the wavelength of 1.06 μm dangerous for vision. Sensing wavelengths of 0.355, 1.57 and 2.09 μm are potentially safe for vision. Laser sensing range for the wavelength of 2.09 μm is slight

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2

Günday, Abdurrahman, Aydın Balabey, Canberk Utar, Muhammed Demir, Muhammed Mert Yılmaz, and Taylan Sipahi. "Effects of vibration frequency and velocity parameters on Doppler frequency shift in laser Doppler vibrometer systems." Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi 15, no. 2 (2025): 397–406. https://doi.org/10.17714/gumusfenbil.1599741.

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In this article, the effects of maximum velocity, vibration frequency and vibration amplitude parameters of objects on Doppler frequency shift (DFS) in Laser Doppler Vibrometer (LDV) systems using lasers at 1064 nm and 1550 nm wavelengths have been examined. In this context, while the velocity change of the object has been obtained in the range of 0 – 1200 µm/s with the laser at 1064 nm wavelength, the DFS varied between 0 and 2255.64 Hz. On the other hand, for 1550 nm wavelength, DFS have taken the values in the range of 0 – 1548.39 Hz. Moreover, for the 1064 nm wavelength, the maximum DFS an

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3

Han, Chang-Fu, Jiun-Ming Chiou, and Jen-Fin Lin. "Deep Trench Isolation and Inverted Pyramid Array Structures Used to Enhance Optical Efficiency of Photodiode in CMOS Image Sensor via Simulations." Sensors 20, no. 11 (2020): 3062. http://dx.doi.org/10.3390/s20113062.

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The photodiode in the backside-illuminated CMOS sensor is modeled to analyze the optical performances in a range of wavelengths (300–1100 nm). The effects of changing in the deep trench isolation depth (DTI) and pitch size (d) of the inverted pyramid array (IPA) on the peak value (OEmax.) of optical efficiency (OE) and its wavelength region are identified first. Then, the growth ratio (GR) is defined for the OE change in these wavelength ranges to highlight the effectiveness of various DTI and d combinations on the OEs and evaluate the OE difference between the pixel arrays with and without th

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Zhang, Jing. "Projection Profiling: A Data Compressing Strategy in Three-Dimensional Liquid Chromatography for Quality Control of Traditional Herbal Medicine." Sensors 25, no. 7 (2025): 2015. https://doi.org/10.3390/s25072015.

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Chromatographic fingerprint technology has become the standard of quality control for traditional herbal medicines (THMs). But several issues are associated with the wavelength selection of the representative fingerprint, such as contradictory evaluation results at different wavelengths and the accurate quantification of each composition at one wavelength. These problems can be addressed by projection profiling. Projection profiling is a collection of all sample compositions at the maximum absorption wavelength after baseline correction. In this paper, eleven baseline correction algorithms are

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Kukurudziak, Mykola S., and Vyacheslav V. Ryukhtin. "Methods of Correction of Spectral Characteristics of Silicon Photodetectors." East European Journal of Physics, no. 1 (March 3, 2025): 290–94. https://doi.org/10.26565/2312-4334-2025-1-34.

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The paper investigates methods for shifting the spectral characteristics of silicon photodiodes toward longer wavelengths. It is established that with increasing the reverse bias voltage of the photodiode, the maximum spectral characteristic shifts towards longer wavelengths due to an increase in the collection coefficient of minority charge carriers, which determines the appearance of the spectral characteristic. With an increase in the lifetime of minor charge carriers and the resistivity of the photodiode base material, the maximum of its spectral characteristic also shifts towards longer w

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Yue-Yu, Xiao, Xu Xin-Yu, and Lai Yan-Xiang. "A rapid demodulation method for the interference spectrum of optical fiber sensors based on machine learning." Laser Physics 34, no. 11 (2024): 115101. http://dx.doi.org/10.1088/1555-6611/ad7c39.

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Abstract Interferometric optical fiber sensors based on wavelength demodulation play an important role in the field of high-precision measurements. Generally used wavelength tracking method is based on the locations of feature wavelengths (peaks or valleys), and a long time of spectrum scanning and demodulation is required. A rapid demodulation method based on machine learning is proposed in this paper, and a more efficient demodulation of the interference spectra of optical fiber sensors is achieved. It is demonstrated by numerical simulations and experiments that the demodulation performance

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7

Evans, JR. "The Dependence of Quantum Yield on Wavelength and Growth Irradiance." Functional Plant Biology 14, no. 1 (1987): 69. http://dx.doi.org/10.1071/pp9870069.

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The wavelength dependence of photosynthetic quantum yield was measured in a leaf disc oxygen electrode using narrow-band interference filters. Photorespiration was suppressed by measuring oxygen evolution in air containing ~ 1% CO2. Rates of oxygen evolution were determined as a function of absorbed irradiances between 0 and 100 �mol quanta m-2 s-1 and the slope was taken as the quantum yield. The wavelength-dependence previously observed in many species was confirmed for pea and spinach leaves. The maximum quantum yields obtained here and by others are close to 0.111 mol O2 mol-1 quanta for r

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8

Pakarzadeh, H., R. Derakhshan, and S. Hosseinabadi. "Tunable wavelength conversion based on optofluidic infiltrated photonic crystal fibers." Journal of Nonlinear Optical Physics & Materials 28, no. 01 (2019): 1950002. http://dx.doi.org/10.1142/s0218863519500024.

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In this paper, wavelength conversion based on optofluidic infiltration of photonic crystal fibers (PCFs) is investigated to achieve the suitable wavelength over wide tunable range. For this purpose, two designs of PCFs (the so-called PCF1 and PCF2) with appropriate dispersion properties are simulated, and wavelength conversion via four-wave mixing process for pump wavelengths in both normal and anomalous dispersion regimes is studied. By changing the refractive index [Formula: see text] of the optical fluid infiltrated into the PCF air-holes and then varying the fiber dispersion properties, th

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KITAMURA, NAOYUKI, KOHEI FUKUMI, JUNICHI NAKAMURA, et al. "LOW-Tg BISMUTH PHOSPHATE GLASSES FOR GLASS-IMPRINTING AND FABRICATION OF 2D SUB-WAVELENGTH STRUCTURE." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (2010): 753–59. http://dx.doi.org/10.1142/s0218863510005662.

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We have developed zinc-bismuth-phosphate glasses, which have deformation temperatures under 450°C and refractive indices higher than 1.7, in order to produce an antireflection structure on the surface by a glass-imprinting process. Two-dimensionally arrayed conical cavities of sub-wavelength size were fabricated on a SiC mold by electron lithography and dry etching techniques. The sub-wavelength periodic structure was transferred onto the glass surface by a glass-imprinting process using the mold. The sub-wavelength structure suppressed the reflectance by approximately 90%. A weak maximum was

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10

Falqués, Albert, Niels Van den Berg, Francesca Ribas, and Miquel Caballeria. "WHAT DETERMINES THE WAVELENGTH OF SELF-ORGANIZED SHORELINE SAND WAVES?" Coastal Engineering Proceedings 1, no. 33 (2012): 6. http://dx.doi.org/10.9753/icce.v33.sediment.6.

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Shoreline undulations extending into the bathymetric contours with a length scale larger than that of the rhythmic surf zone bars are referred to as shoreline sand waves. Many observed undulations along sandy coasts display a wavelength in the order 1-7 km. Several models that are based on the hypothesis that sand waves emerge from a morphodynamic instability in case of very oblique wave incidence predict this range of wavelengths. Here we investigate the physical reasons for the wavelength selection and the main parametric trends of the wavelength in case of sand waves arising from such insta

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11

Magafas, L. "Optical Response Study of the Al/a-Sic:H Schottky Diode for Different Substrate Temperatures of the R.F. Sputtered a-Sic:H Thin Film." Active and Passive Electronic Components 26, no. 2 (2003): 63–70. http://dx.doi.org/10.1080/0882751021000010627.

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In the present work, Schottky diodes of Al/a-SiC:H included in the structure Al/a-SiC:H/c-Si(n)/Al were fabricated and their optical response was studied in the wavelength region from 350 nm up to 1000 nm, for different substrate temperatures,Ts(from 30°C up to 290°C) of the r.f. sputtered a-SiC:H thin film. The spectral response of these structures exhibits two maximum values of quantum efficiency. The first maximum is presented at wavelengthλ≅525nm and the other atλ=850850 nm, which are attributed to the Aa-SiC:H Schottky junction and the a-SiC:H/c-Si(n) isotype heterojunction, respectively.

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12

Gao, Mingquan, Bin Yin, Yanzhi Lv, et al. "Tunable and Switchable Dual-Wavelength SLM Narrow-Linewidth Fiber Laser with a PMFBG-FP Filter Cascaded by Multi-Ring Cavity." Photonics 9, no. 10 (2022): 756. http://dx.doi.org/10.3390/photonics9100756.

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A single longitudinal mode (SLM) dual-wavelength switchable erbium-doped fiber laser (DW-EDFL) based on polarization-maintaining fiber Bragg grating Fabry–Perot cavity (PMFBG-FP) cascaded multiple sub-ring cavities (MSCs) is proposed. A PMFBG-FP with a narrow-band transmission peak and MSCs was implemented as an optical filter to achieve stable dual-wavelength laser output and guaranteed SLM status. By stretching the PMFBG, a highly stable dual-wavelength tunable output could be achieved with a maximum tuning interval of 0.17 nm. The optical signal-to-noise-ratio (OSNR) at dual-wavelength lasi

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13

Bube, Kenneth P., Robert T. Langan, and Tamas Nemeth. "Analysis of the spectral hole in velocity versus depth resolution for reflection traveltimes with limited aperture." GEOPHYSICS 70, no. 3 (2005): U37—U45. http://dx.doi.org/10.1190/1.1925751.

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It is difficult to resolve the ambiguity between velocity and reflector depth using reflection traveltimes when the aperture is small, as is common for deep reflectors. For velocity perturbations that are independent of the vertical variable, there is an even stronger velocity-versus-depth ambiguity at a horizontal wavelength of 2.5 times the reflector depth. We give a theoretical explanation of why this spectral hole occurs. When the maximum offset is small, there are velocity and reflector depth perturbations that cause almost cancelling traveltime perturbations; the net traveltime perturbat

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14

Aprilia, Riana, Marisa Alifaturrohmah, Gilang Purnama, and Siti Wahyuni. "The Examination of the Wien’s Displacement Constant with Simulation and Simple Numerical Approaches." Physics Communication 6, no. 2 (2022): 71–78. http://dx.doi.org/10.15294/physcomm.v6i2.39821.

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The purpose of this research was to examine the value of the Wien’s constant using PhET Simulation virtual laboratory and simple numerical approach. The independent and dependent variable is blackbody temperature (T) and maximum wavelength (λ_max). In the use of a virtual laboratory, research is carried out by shifting the black body temperature feature so the graph will display a spectral power density that varies to the wavelenght. Numerical approach was used in this research is Newton Raphson methods by Python program. Both of simulation and numerical approach yield the value of the maximum

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15

Shi, Boya, Chang Liu, Xinyan Lei, Junfa Zhao, and Shuxia Yan. "Tunable and Switchable Multi-Wavelength Erbium-Doped Fiber Laser Based on Composite Structure Filter." Photonics 9, no. 10 (2022): 768. http://dx.doi.org/10.3390/photonics9100768.

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A multi-wavelength erbium-doped fiber laser (MW-EDFL) with wide tuning range, switching and adjustable wavelength interval is designed and tested, which is based on a composite filter. The filter consists of a tapered microfiber coupler loop (TMCL) with a nested single mode fiber (SMF)-two mode fiber (TMF)-SMF (STS) structure, which has a comb spectrum with obvious envelope and uniform fluctuation. Our experimental and theoretical results show that the laser can output thirteen wavelengths, when the angles of two polarization controllers (PCs) in the TMCL are accurately set. Moreover, by adjus

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16

Wacogne, Bruno, Marine Belinger Podevin, Naïs Vaccari, et al. "Concentration vs. Optical Density of ESKAPEE Bacteria: A Method to Determine the Optimum Measurement Wavelength." Sensors 24, no. 24 (2024): 8160. https://doi.org/10.3390/s24248160.

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Optical density measurement has been used for decades to determine the microorganism concentration and more rarely for mammalian cells. Although this measurement can be carried out at any wavelength, studies report a limited number of measurement wavelengths, mainly around 600 nm, and no consensus seems to be emerging to propose an objective method for determining the optimum measurement wavelength for each microorganism. In this article, we propose a method for analyzing the absorbance spectra of ESKAPEE bacteria and determining the optimum measurement wavelength for each of them. The method

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17

Van Bay, Mai, Nguyen Khoa Hien, Phan Thi Diem Tran, et al. "TD‐DFT benchmark for UV‐Vis spectra of coumarin derivatives." Vietnam Journal of Chemistry 59, no. 2 (2021): 203–10. http://dx.doi.org/10.1002/vjch.202000200.

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AbstractThe predictive performances for maximum absorption wavelength of the PBE, BP86, PBE0, B3LYP, M06, M06‐2X, CAM‐B3LYP, LC‐wPBE, APDF, wB97XD, and PW6B9D3 functionals have been benchmarked through comparison of maximum absorption wavelength values between calculation and experiment of 21 coumarin derivatives. For the results obtained from direct calculation by these functionals, the predictive performance decreases gradually in the following order: B3LYP > APDF > M06 > PW6B9D3 > PBE0 > BP86 > PBE > M06‐2X > CAM‐B3LYP > wB97XD > LC‐wPBE. B3LYP functional gives

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18

Chen, Shuguo, Cheng Xue, Tinglu Zhang, Lianbo Hu, Ge Chen, and Junwu Tang. "Analysis of the Optimal Wavelength for Oceanographic Lidar at the Global Scale Based on the Inherent Optical Properties of Water." Remote Sensing 11, no. 22 (2019): 2705. http://dx.doi.org/10.3390/rs11222705.

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Understanding the optimal wavelength for detecting the water column profile from a light detection and ranging (lidar) system is important in the design of oceanographic lidar systems. In this research, the optimal wavelength for detecting the water column profile using a lidar system at the global scale was analyzed based on the inherent optical properties of water. In addition, assuming that the lidar system had a premium detection characteristic in its hardware design, the maximum detectable depth using the established optimal wavelength was analyzed and compared with the mixed layer depth

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19

Echevarría, J. "Multi-Wavelength Observations of Dwarf Novae during Outburst." International Astronomical Union Colloquium 93 (1987): 103–9. http://dx.doi.org/10.1017/s0252921100104695.

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AbstractMulti-wavelength observations of dwarf novae during outburst are presented here. Thirty three objects were observed, of which seventeen were at outburst. Six objects were caught during the rise, and a short flare was detected in SU UMa. It lasted 20 hours and reached a maximum increase of 3.6 in flux at 5500 A. The flare was simultaneous at all observed wavelengths.

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20

Xu, Ruijia, and Yu-Sheng Lin. "Tunable Infrared Metamaterial Emitter for Gas Sensing Application." Nanomaterials 10, no. 8 (2020): 1442. http://dx.doi.org/10.3390/nano10081442.

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We present an on-chip tunable infrared (IR) metamaterial emitter for gas sensing applications. The proposed emitter exhibits high electrical-thermal-optical efficiency, which can be realized by the integration of microelectromechanical system (MEMS) microheaters and IR metamaterials. According to the blackbody radiation law, high-efficiency IR radiation can be generated by driving a Direct Current (DC) bias voltage on a microheater. The MEMS microheater has a Peano-shaped microstructure, which exhibits great heating uniformity and high energy conversion efficiency. The implantation of a top me

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Wei, Zhiwen, Haiyan Yang, Jie Shi, et al. "Effects of Different Light Wavelengths on Fruit Quality and Gene Expression of Anthocyanin Biosynthesis in Blueberry (Vaccinium corymbosm)." Cells 12, no. 9 (2023): 1225. http://dx.doi.org/10.3390/cells12091225.

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Different light wavelengths display diverse effects on fruit quality formation and anthocyanin biosynthesis. Blueberry is a kind of fruit rich in anthocyanin with important economic and nutritional values. This study explored the effects of different light wavelengths (white (W), red (R), blue (B) and yellow (Y)) on fruit quality and gene expression of anthocyanin biosynthesis in blueberry. We found that the B and W treatments attained the maximum values of fruit width, fruit height and fruit weight in blueberry fruits. The R treatment attained the maximum activities of superoxide dismutase (S

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Hu, Yue, and Wei Pan. "Calculation of Pore Scattering in Transparent Ceramics." Solid State Phenomena 281 (August 2018): 655–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.655.

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Light scattering caused by pores detrimentally affects the optical transparency of transparent ceramics. Herein, Mie theory has been used to calculate the cross-section of pore scattering in transparent ceramics, and the influence of wavelength, pore size distribution and refractive index has been discussed in detail. For wavelength between 200 nm and 2000 nm, the scattering cross-section decreases with increasing wavelength, which means that pore scattering is more detrimental to short-wavelength transparency. With ZOLD function simulating the pore size distribution inside the ceramic, it has

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Ahmad, H., J. W. Chiam, M. Z. Samion, M. K. A. Zaini, M. Z. Zulkifli, and K. Thambiratnam. "Tunable wide spacing all-fiber dual-wavelength holmium-doped fiber laser using a Lyot filter operating above 2 µm." Laser Physics 34, no. 1 (2023): 015102. http://dx.doi.org/10.1088/1555-6611/ad109a.

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Abstract In this work, we successfully demonstrated an all-fiber, dual-wavelength holmium-doped fiber laser (HDFL) with a tunable wavelength spacing range of 8 nm to 24 nm. The HDFL utilizes a Lyot filter to obtain a stable dual wavelength output, with the Lyot filter being constructed from a polarizer, a 20 m polarizing maintaining fiber (PMF) and two polarization controllers (PCs). The dual-wavelength HDFL has an operating wavelength range from 2072.1 nm to 2097.2 nm and a maximum spacing of 24 nm between the lasing wavelengths as well as a signal-to-noise ratio of up to 45 dB and a side mod

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24

Bai, Yang, Zhi-Han Chen, Ben Li, Shun-Yu Yang, Hui Liu, and Jing-Feng Zhou. "Wavelength-variable low-noise all-solid-state yellow-green laser based on BP-frequency selection and BC-filtering." Laser Physics 32, no. 12 (2022): 125803. http://dx.doi.org/10.1088/1555-6611/aca029.

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Abstract A continuous wave (CW) Watt-level wavelength-variable low-noise all-solid-state yellow-green laser was developed by using the Brewster polarizer frequency selection and birefringent crystal filtering methods. The maximum CW output power of the yellow-green laser beams radiating at wavelengths of 556.32 nm, 558.36 nm and 561.63 nm was measured to be 2.922 W, 2.713 W and 2.514 W, respectively. When the CW output power was 2.5 W within 4 h, the power instability of the three yellow-green laser beams from the shortest wavelength to longest wavelength was ±0.55%, ±0.46%, and ±0.69%, respec

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Wagner, F., and A. M. Silva. "Some considerations about Ångström exponent distributions." Atmospheric Chemistry and Physics Discussions 7, no. 4 (2007): 12781–805. http://dx.doi.org/10.5194/acpd-7-12781-2007.

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Abstract. A simulation study has been performed in order to show the influence of the aerosol optical thickness (AOT) distribution together with the corresponding error distribution on the resulting Ångström exponent (AE) distribution. It will be shown that the Ångström exponent frequency of occurrence distribution is only normal distributed when the relative error at the two wavelengths used for estimation of the Ångström exponent is the same. In all other cases a shift of the maximum of the AE-distribution will occur. It will be demonstrated that the Ångström exponent (or the maximum of an A

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Wagner, F., and A. M. Silva. "Some considerations about Ångström exponent distributions." Atmospheric Chemistry and Physics 8, no. 3 (2008): 481–89. http://dx.doi.org/10.5194/acp-8-481-2008.

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Abstract. A simulation study has been performed in order to show the influence of the aerosol optical depth (AOD) distribution together with the corresponding error distribution on the resulting Ångström exponent (AE) distribution. It will be shown that the Ångström exponent frequency of occurrence distribution is only normal distributed when the relative error at the two wavelengths used for estimation of the Ångström exponent is the same. In all other cases a shift of the maximum of the AE-distribution will occur. It will be demonstrated that the Ångström exponent (or the maximum of an AE di

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27

Lin, Zhining, Shujing Chen, and Chengyou Lin. "Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study." Sensors 20, no. 9 (2020): 2445. http://dx.doi.org/10.3390/s20092445.

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In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS2, WS2 and WSe2) hybrid structure, and theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) and the layer number of each 2D material are optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. Then, the sensitivities of proposed SPR sensors with different metal films at various wavelengths are compared. An Ag-based SPR sensor exhibits a higher sensitivity t

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Yohakim, Yoman Ribeta Ratu, Siti Hamia Maodjud, Elisabeth Jaa Ngaga, Adi Jufriansah, and Sahlan. "Exploration of Wien Displacement Law: A Fundamental Concept in Quantum Physics." Bincang Sains dan Teknologi 3, no. 03 (2024): 85–96. https://doi.org/10.56741/bst.v3i03.648.

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This study explores the relationship between the temperature of a black body and the wavelength of the radiation it emits based on the Wien Displacement Law. This experiment collected maximum temperature and wavelength data using PhET simulation software and other supporting devices. The Wien Displacement Law states that the wavelength at which the maximum intensity of blackbody radiation occurs (λmax) is inversely proportional to the absolute temperature of the object (T). To test this law, the temperature of the blackbody was set at various values in the simulation, and the resulting maximum

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N. I. Chkhalo, V. N. Polkovnikov, N.N. Salashchenko, and R.A. Shaposhnikov. "Prospective wavelengths for projection lithography uing synchrotron radiation." Technical Physics 92, no. 8 (2022): 1023. http://dx.doi.org/10.21883/tp.2022.08.54567.102-22.

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Promising wavelengths for next-generation lithography with a wavelength shorter than 13.5 nm based on a synchrotron X-ray source are discussed. Theoretical and experimental values of the reflection coefficients of multilayer X-ray mirrors providing the maximum reflectivity in the range of 11.4-3.1 nm are presented. The theoretical efficiency of multilayer optics is compared for different wavelengths. Keywords: X-ray lithography, multilayer X-ray optics, multilayer X-ray mirrors.

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Li, Guangwei, Dismas Choge, Huaixi Chen, Yibin Xu, Lei Guo, and Wanguo Liang. "Broadband and Triple-Wavelength Continuous Wave Orange Laser by Single-Pass Sum-Frequency Generation in Step-Chirped MgO:PPLN." Applied Sciences 8, no. 9 (2018): 1657. http://dx.doi.org/10.3390/app8091657.

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We have demonstrated sum-frequency generation of a compact continuous-wave orange laser in a step-chirped magnesium oxide doped periodically poled lithium niobate in single-pass mode. A 974 nm laser diode was mixed with a C-band amplified spontaneous emission laser source to yield a triple-wavelength operation at 594.9, 596.9, and 598.6 nm with a maximum output power of 9.3 mW and broad bandwidth of ~4.4 nm. The triple-wavelength output power stability was ~2.5% in 30 min. This technique provides a path to generate broadband laser sources at shorter wavelengths which are potentially useful for

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Synolakis, Costas Emmanuel, and Manas Kumar. "ON THE MAXIMUM RUNUP OF CNOIDAL WAVES." Coastal Engineering Proceedings 1, no. 21 (1988): 39. http://dx.doi.org/10.9753/icce.v21.39.

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This is a study of the maximum runup of cnoidal waves on plane beaches. An approximate theory is described for determining the maximum runup of nonbreaking cnoidal waves. It is shown that the linear and nonlinear theory predict mathematically identical maximum runup heights. An asymptotic result is derived for the maximum runup of solitary waves, which are one limiting form of cnoidal waves. A series of laboratory experiments is described to support the theory. Other numerical results are presented that suggest that the runup of cnoidal waves is significantly higher than the runup of monochrom

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VIÉNOT, FRANÇOISE, LUCILE SERREAULT, and PEDRO PARDO FERNANDEZ. "Convergence of experimental multiple Rayleigh matches to peak L- and M-photopigment sensitivity estimates." Visual Neuroscience 23, no. 3-4 (2006): 419–27. http://dx.doi.org/10.1017/s0952523806233480.

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Shift in the wavelength of peak sensitivity of the cone photo pigments is a major cause of inter-individual variations in the Rayleigh match. Normal color observers performed multiple Rayleigh matches (i.e., a series of seven Rayleigh-type color matches using various sets of test and primary lights) in order to derive estimates of the M- and L-photo pigment wavelengths of maximum absorbance. We predicted the ratio of incident radiances Pr/Pg for a range of plausible values in terms of wavelength of the peak sensitivity of the M-cone and L-cone. An algorithm allowed us to adjust the values of t

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Suyanto, Hery, Manuntun Manurung, I. Putu Tedy Indrayana, and Fiar Tri Santika. "The Correlation between Dye absorption Wavelength and Illumination Wavelength on DSSC Performance." Jurnal Kimia Sains dan Aplikasi 26, no. 4 (2023): 118–24. http://dx.doi.org/10.14710/jksa.26.4.118-124.

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This study examines the effect of the wavelength of light illuminated on DSSC on the absorption wavelength and gap dye energy. The dye used was sea lettuce anthocyanin from Sanur Beach, Bali. As much as 20 grams of dried sea lettuce powder was dissolved in 80 mL of 96% ethanol and 6% HCl. After 24 hours of immersion, it was filtered with Whatman 41 paper. The filtrate was characterized using a UV-Vis-NIR spectrophotometer so that the absorption wavelengths of the anthocyanin dye were 272.5 nm, 417 nm, and 653.5 nm. The gap energy was calculated using the Tauc Plot method, and the result was 2.

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Amiri, Nina, Peter Krzystek, Marco Heurich, and Andrew Skidmore. "Classification of Tree Species as Well as Standing Dead Trees Using Triple Wavelength ALS in a Temperate Forest." Remote Sensing 11, no. 22 (2019): 2614. http://dx.doi.org/10.3390/rs11222614.

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Knowledge about forest structures, particularly of deadwood, is fundamental for understanding, protecting, and conserving forest biodiversity. While individual tree-based approaches using single wavelength airborne laserscanning (ALS) can successfully distinguish broadleaf and coniferous trees, they still perform multiple tree species classifications with limited accuracy. Moreover, the mapping of standing dead trees is becoming increasingly important for damage calculation after pest infestation or biodiversity assessment. Recent advances in sensor technology have led to the development of ne

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Shao, Jinning, Yue Liu, Jiaqi Yan, et al. "Prediction of Maximum Absorption Wavelength Using Deep Neural Networks." Journal of Chemical Information and Modeling 62, no. 6 (2022): 1368–75. http://dx.doi.org/10.1021/acs.jcim.1c01449.

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Yang, Lu, Qing Song, Zhihui Wang, and Shihui Zhang. "Maximum linear matching: Intelligent and automatic wavelength calibration method." Concurrency and Computation: Practice and Experience 29, no. 24 (2017): e4232. http://dx.doi.org/10.1002/cpe.4232.

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Dahlkild, Anders A. "Finite wavelength selection for the linear instability of a suspension of settling spheroids." Journal of Fluid Mechanics 689 (November 7, 2011): 183–202. http://dx.doi.org/10.1017/jfm.2011.410.

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AbstractThe instability of an initially homogeneous suspension of spheroids, settling due to gravity, is reconsidered. For non-spherical particles, previous studies in the literature report that normal-mode density perturbations of maximum growth rate are those of arbitrarily large, horizontal wavelength. Using the ‘mixture theory’ for two-phase flow we show that the maximum growth rate for horizontal density perturbations is obtained for a finite wavelength if the inertia of the bulk motion associated with the normal-mode density perturbation is accounted for. We find that for long wavelength

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Lv, Shuyuan, Jie Jia, Wenfeng Luo, and Xinhui Li. "Design and research of dual-wavelength polarization multiplexing multifocal metalens based on superimposed nano-antenna array." Materials Research Express 8, no. 11 (2021): 115802. http://dx.doi.org/10.1088/2053-1591/ac39c3.

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Abstract In this study, based on the single-layer metasurface structure, a dual-wavelength polarization multiplexing metalens is designed at the communication wavelengths of 1310 nm and 1550 nm, respectively. Using the dual-phase modulation method, a single-wavelength polarization multiplexing metalens is proposed, which can simultaneously control left-handed circularly polarized light (LCP) and right-handed circularly polarized light (RCP). Furthermore, the cross superposition method is used to combine them to achieve the dual-wavelength polarization multiplexing metalens. The results show th

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Zhao, Lina, Wenyu Zhang, Ye Yuan та ін. "Mo:BiVO4 Nanoparticles-Based Optical Modulator and Its Application in a 2-μm Pulsed Laser". Nanomaterials 11, № 12 (2021): 3243. http://dx.doi.org/10.3390/nano11123243.

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Mo:BiVO4 nanoparticles were employed as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time. The nonlinear optical parameters of Mo:BiVO4 nanoparticles in the 2-μm region were characterized by measuring nonlinear transmission. Saturation intensity was 718 MW/cm2, and the modulation depth was 12.3%. A stable pulse sequence was acquired with a 70.08 kHz maximum repetition rate and an 821 ns pulse width. The maximum output average power was 153 mW, corresponding to 2.18 μJ single pulse energy and 2.67 W peak power. Although the response wavelength of Mo:BiVO4 is i

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Widagda, IGA, Ni Luh Putu Trisnawati, and I. Wayan Gede Suharta. "Application Design of Newton-Rapshon method in Proving Maximum Wavelength on Wien’s Displacement Law." BULETIN FISIKA 24, no. 2 (2023): 154. http://dx.doi.org/10.24843/bf.2023.v24.i02.p13.

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The Calculation of the maximum wavelength (?m) of radiation emitted by a black body can be determined from the Wien displacement law, which states the ratio between the Wien constant and the absolute temperature (T). Wien's displacement law can be derived analytically from the Energy Density equation (U?) in Plank's law. The solution for U? is obtained by calculating the first derivative of the function with respect to ? or dU?/d?, and then proceeding with finding a solution to the equation for the derivative. The solution of dU?/d? is the value of ? that makes dU?/d? equal to zero. The result

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Batomunkuev, Yuriy, and Nikolay Mescheryakov. "Calculation of the X-Ray Holographic Lens for the Nanometric Range of Spectrum." Siberian Journal of Physics 4, no. 2 (2009): 3–7. http://dx.doi.org/10.54362/1818-7919-2009-4-2-3-7.

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Calculation of x-ray holographic lenses with corrective spherical aberration of the seventh order for working wavelength 2,4 nm, 4,5 nm and 13,5 nm is executed in article. The radius of surfaces of holographic lenses is determined from condition of maximum of diffractive efficiency. It is shown that consideration of shrinkage of thickness of the holographic lenses allows to correct the spherical aberration of the fifth order. It is obtained that holographic lenses with greatly different working wavelengths can be recorded on one scheme by choice of optimum of wavelength of coherent source. The

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Zhang, Xianfeng, Long Wang, and Jinfeng Zhang. "Assessment of metro running safety and comfort under uneven tunnel settlement." Journal of Physics: Conference Series 3005, no. 1 (2025): 012020. https://doi.org/10.1088/1742-6596/3005/1/012020.

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Abstract Uneven tunnel settlement has adverse effects of varying degrees on tunnel structures, track structures, and metro train operating conditions. With increasing emphasis on the safety and comfort of metro operations, it is necessary to assess the metro running safety and comfort under uneven settlement conditions. Utilizing a vehicle-track dynamic interaction model, this paper analyzes the variations in the wheel load reduction rate, maximum vertical acceleration of the car body, and the stability index under cosine-shaped settlement curves with different settlement wavelengths and ampli

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Alawsi, Suha Mousa Khorsheed, Noor Mohammed Hassan, and Intehaa Abdullah Mohammed Al-Juboury. "Effect of Nonlinear Dispersion Fiber Length and Input Power on Raman Scattering." NeuroQuantology 19, no. 11 (2021): 47–65. http://dx.doi.org/10.14704/nq.2021.19.11.nq21175.

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The increasing demand for information transmission makes the problem of establishing a laser system is operating in C-band (1530-1565nm) wavelength region is a significant task, which attracts a lot of researchers' attention lately. In this paper, the ability to produce signals of multi wavelengths using a single light source was adopted to employ the Raman scattering effect for establishing Raman shift configuration-based multi-wavelength fiber lasers, which is not currently addressed in available schemes. This is what prompted to simulate the performance of C-band multi-wavelength produced b

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Wang, Peiyuan. "Optimal Design of Fiber Amplifier based on Thulium, YttErbium and Bismuth." Highlights in Science, Engineering and Technology 46 (April 25, 2023): 134–41. http://dx.doi.org/10.54097/hset.v46i.7694.

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Although Erbium-doped fiber amplifier is still the mainstream of optical fiber communication nowadays, it has some limitations. The operation of EDFA is limited to 1530-1610nm, so it is an important research direction to explore different elements. This paper introduces three kinds of fiber amplifiers doped with different rare earth elements: Thulium-doped, YttErbium-doped, and Bismuth-doped fiber amplifiers. The optimal optimization performance is obtained through comparison logic by adjusting various parameters. The maximum gains of three rare-earth-doped fiber amplifiers in different wavele

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Zhang, Xiao Li, Da Kai Liang, and Jie Zeng. "Use Piezoelectric Bimorph for the Fiber Bragg Grating Tuner." Advanced Materials Research 143-144 (October 2010): 196–200. http://dx.doi.org/10.4028/www.scientific.net/amr.143-144.196.

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A wavelength tunable optical filter based on a fiber Bragg grating using piezoelectric bimorph is realized in this paper, and the tuning condition is theoretically and experimentally analyzed. The Bragg central wavelength of the filter can be easily tuned adopting to a DC voltage. The maximum strain of the central wavelength depends upon the maximum operating voltage, and the tuning range efficiency was as high as 1.2pm/V, the reflectivity, shape and the reflective spectrums of the fiber Bragg grating central wavelength almost keep unchanged before and after tunning. This paper provides a refe

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Pulungan, Ainil Fithri, Effendy DLP., and Siti MS. "Simultaneous Spectrophotometric Determination of Paracetamol, Propyphenazone and Caffeine By Using Absorption Ratio Method." Asian Journal of Pharmaceutical Research and Development 6, no. 5 (2018): 5–8. http://dx.doi.org/10.22270/ajprd.v6i5.412.

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The Absorption Ratio method involves measuring the absorbance at two wavelengths, namely the iso-absorptive point and the maximum wavelength. Its method could be an option in determining the level of a drug. The aim of this study was to determine whether the absorption ratio method can be used to determine the levels of paracetamol (PCT), propyphenazone (PRO) and caffeine (CAF) in tablet form. The absorption ratio method was used to determine the levels of the mixed drug compound without the separation stage and using the maximum wavelength and iso-absorptif point. The result of the study show

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Alizadeh, Mohammad Reza, and Mahmood Seifouri. "Design and Analysis of a Dispersion-engineered and Highly Nonlinear Rib Waveguide for Generation of Broadband Supercontinuum Spectra." Frequenz 74, no. 3-4 (2020): 153–61. http://dx.doi.org/10.1515/freq-2019-0098.

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AbstractIn this paper, a waveguide consisting of a core of As2Se3 chalcogenide glass and the upper and lower claddings of MgF2 with two zero-dispersion wavelengths (ZDW) has been proposed. By optimization of the dimensions of the core and the claddings, their effects on the dispersion curve have been investigated and a suitable structure with a flat dispersion curve, an effective mode area of 1.6 μm2 in a pump wavelength of 2.8 μm, and hence, a nonlinear coefficient greater than 34 w−1 m−1 has been obtained. A broadband supercontinuum in a wavelength range of 1.5 μm to 15 μm has been generat

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Le, Thi Thuy My, Hanh Nguyen Thi My, and Le Thai Nguyen. "Impact of green-emitting CaSc2O4: Ce3+ phosphor on the illuminance and color uniformity of white-light-emitting diodes." Impact of green-emitting CaSc2O4: Ce3+ phosphor on the illuminance and color uniformity of white-light-emitting diodes 32, no. 1 (2023): 129–33. https://doi.org/10.11591/ijeecs.v32.i1.pp129-133.

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With blue light stimulation, a novel green phosphor, Ce3+ -activated CaSc2O4, was created, which emits green illumination with a maximum wavelength of 515 nm. Since the brightness performance of Ce3+ -activated CaSc2O4 is equivalent to that of commercial phosphors such as Y3Al5O12: Ce3+, it may be utilized as a substance for chroma transformation in white-light-emitting diodes (WLEDs) that comprise one blue LED, one green phosphor, as well as one red phosphor. The Ce ion is most likely at an eight-coordinated Ca position in the base crystal for said phosphor, which posesses orthorhombic CaFe2O

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Yoo, Ho-Jun, Hyoseob Kim, Changhwan Jang, Ki-Hyun Kim, and Tae-Soon Kang. "Maximum Run-Up and Alongshore Mass Transport Due to Edge Waves." Journal of Marine Science and Engineering 10, no. 7 (2022): 894. http://dx.doi.org/10.3390/jmse10070894.

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The edge wave on a uniform-sloped seabed was described by the velocity-potential function by Mok and Yeh in 1999. Edge waves cannot be extended above a certain level from the still-water level, and the upper limit of the run-up of the edge waves for given conditions is found here. In this study, quantitative mass transport by the edge waves of the beach is introduced. The maximum run-up height is decided from the wave’s amplitude at shoreline, and the maximum run-up distance from the shoreline is proportional to the wavelength of the edge waves. The fluid alongshore-mass-transport profile show

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Bhavana., Nagireddy* A. Elphine Prabhahar P.V.Suresh Rama Rao Nadendla. "SIMULTANEOUS ESTIMATION OF AMBROXOL, CHLORPHENERAMINE MALEATE AND GUAIPHENESIN IN BULK AND LIQUID DOSAGE FORM BY CHEMOMETRIC ASSISTED SPECTROPHOTOMETRIC METHODS." INDO AMERICAN JOURNAL OF PHARMACEUTICAL RESEARCH 07, no. 09 (2017): 445–58. https://doi.org/10.5281/zenodo.1036411.

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A simple UV-visible spectroscopic method was developed and Chemometric designs were applied for the simultaneous estimation of Ambroxol (AMB), Chlorpheneramine maleate (CPM) and Guaiphenesin (GPN) in bulk and liquid dosage form. The spectroscopic method was developed by using methanol as solvent for the three drugs and the data generated from the spectra were mined by using Chemometric methods such as trilinear regression analysis, Cramer’s matrix method, Method of least squares, Multivariate calibration methods such as partial least square regression(PLS) and Principle component regression(PC

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