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Journal articles on the topic 'Pulsed light modulation'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Wojtkowski, Wojciech, and Rafał Kociszewski. "Pulse-Width Modulation Approaches for Efficient Harmonic Suppression." Electronics 14, no. 13 (2025): 2651. https://doi.org/10.3390/electronics14132651.

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Pulse-width modulation (PWM) and pulse-density modulation (PDM) are widely used in applications where electrical energy is delivered in a pulsed manner. Typical examples include LED (light-emitting diode) control, DC motor control, switched-mode power supplies (SMPS), and electric heating control. However, the pulsed operation of power switches is often associated with significant electromagnetic interference (EMI). As an alternative, stochastic pulse-density modulation (SPDM), also referred to as stochastic signal density modulation (SSDM), can be considered. This technique distributes the en

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2

Fan, S., X. Zhang, X. Gu, H. Shen, and M. Liu. "Influence of pulse width on luminous efficiency for a two-degree field." Lighting Research & Technology 49, no. 3 (2016): 357–69. http://dx.doi.org/10.1177/1477153515626772.

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A two-degree bipartite field was used to investigate the influence of pulse width on human luminous perception. The frequency of the pulsed light was 100 Hz and the duty ratio was set to 1, 2, 5, 10, 20, 30, 50 and 70%. The results show that pulsed light has a brightness enhancement effect and that the enhancement effect changes when the wavelength and duty ratio are different. The maximum enhancement effect appears at 430 nm and the minimum at 460 nm. Then, a theoretical spectral luminous function for pulsed light as a function of wavelength and duty ratio was calculated using cone fundamenta

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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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Lin, Shangfei, Hui Jiang, Qiqi Fu, et al. "Effects of Pulsed Light on Mycelium Growth and Conidiation in Aspergillus oryzae." Fermentation 9, no. 7 (2023): 674. http://dx.doi.org/10.3390/fermentation9070674.

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Understanding how Aspergillus oryzae responds to light is critical for developing efficient light regulation strategies in the brewing and waste treatment industries. Although continuous light is known to restrict A. oryzae, little is known about A. oryzae’s sensitivity to light with photoperiod. In this study, we used pulse wave modulation (PWM) to generate nine pulsed blue light (PBL) treatments with varying peak light intensities and frequencies. The effect of PBL on A. oryzae was then compared to that of continuous blue light (CBL). Our findings showed that A. oryzae GDMCC 3.31 mycelium de

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Wu, Jianhua, Xiaofeng Zhang, and Liang Chen. "Research on the Dual Modulation of All-Fiber Optic Current Sensor." Sensors 22, no. 2 (2022): 430. http://dx.doi.org/10.3390/s22020430.

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Acousto-optic modulator (AOM) and electro-optical modulator (EOM) are applied to realize the all-fiber current sensor with a pulsed light source. The pulsed light is realized by amplitude modulation with AOM. The reflected interferometer current sensor is constructed by the mirror and phase modulation with EOM to improve the anti-interference ability. A correlation demodulation algorithm is applied for data processing. The influence of the modulation frequency and duty cycle of AOM on the optical system is determined by modeling and experiment. The duty cycle is the main factor affecting the n

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Wu, Xinyang, Dongdong Wang, Di Song, et al. "Influence of Opening Time Interval of Gate Signals on Suppression of Horizontally Polarized Signal of Infrared Pulsed Laser." Materials 17, no. 21 (2024): 5276. http://dx.doi.org/10.3390/ma17215276.

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Since the beginning of the 21st century, infrared Nd:YVO4 pulsed lasers have been widely applied, especially in some actual industrial processes. In the working process of a laser-aided etching device, the “match-head” effect must be effectively controlled by suppressing the first giant pulse for a solid-state Q-switched laser. In the process of optimizing the infrared Nd:YVO4 pulsed laser by adjusting the slope parameters of the radio frequency (RF) modulation to suppress the first giant pulse, it has been found that an abnormal horizontally polarized emission with a very short time appears b

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Palato, Samuel, Philipp Schwendke, Nicolai B. Grosse, and Julia Stähler. "Pseudoheterodyne near-field imaging at kHz repetition rates via quadrature-assisted discrete demodulation." Applied Physics Letters 120, no. 13 (2022): 131601. http://dx.doi.org/10.1063/5.0087187.

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Scattering-type scanning near-field optical microscopy enables the measurement of optical constants of a surface beyond the diffraction limit. Its compatibility with pulsed sources is hampered by the requirement of a high-repetition rate imposed by lock-in detection. We describe a sampling method, called quadrature-assisted discrete (quad) demodulation, which circumvents this constraint. Quad demodulation operates by measuring the optical signal and the modulation phases for each individual light pulse. This method retrieves the near-field signal in the pseudoheterodyne mode, as proven by retr

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González, Ernesto, Juan Casanova-Chafer, Aanchal Alagh, et al. "On the Use of Pulsed UV or Visible Light Activated Gas Sensing of Reducing and Oxidising Species with WO3 and WS2 Nanomaterials." Sensors 21, no. 11 (2021): 3736. http://dx.doi.org/10.3390/s21113736.

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This paper presents a methodology to quantify oxidizing and reducing gases using n-type and p-type chemiresistive sensors, respectively. Low temperature sensor heating with pulsed UV or visible light modulation is used together with the application of the fast Fourier transform (FFT) to extract sensor response features. These features are further processed via principal component analysis (PCA) and principal component regression (PCR) for achieving gas discrimination and building concentration prediction models with R2 values up to 98% and RMSE values as low as 5% for the total gas concentrati

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Pesonen, Henri, Kimmo Saastamoinen, Matias Koivurova, Tero Setälä, and Jari Turunen. "Temporal coherence modulation of pulsed, scalar light with a Fabry–Pérot interferometer." Journal of the Optical Society of America A 36, no. 7 (2019): 1137. http://dx.doi.org/10.1364/josaa.36.001137.

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10

Berndt, Klaus W., Ignacy Gryczynski, and Joseph R. Lakowicz. "Phase‐modulation fluorometry using a frequency‐doubled pulsed laser diode light source." Review of Scientific Instruments 61, no. 7 (1990): 1816–20. http://dx.doi.org/10.1063/1.1141099.

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Zhao, Xiaoli, Jingxuan Sun, Yachen Wang, Xiaogang Wang, and Bo Fu. "Ag/MXene as Saturable Absorber for Tm:Ho Co-Doped Q-Switched Fiber Laser." Nanomaterials 14, no. 11 (2024): 951. http://dx.doi.org/10.3390/nano14110951.

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Q-switched fiber lasers have become reliable light sources for generating high-energy pulses, which can be passively modulated by saturable absorbers with excellent nonlinear optical properties. The composite combining Ag and MXene exhibits a broadband nonlinear response and high modulation depth, making it a promising candidate for saturable absorbers in pulsed lasers. Herein, we demonstrate a Q-switched Tm:Ho co-doped fiber laser centered at 2 µm, where the Ag/MXene composite serves as a saturable absorber to generate pulses. The typical spectrum, pulse train, and radio frequency spectrum of

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Zhong, Hongtao, Tingyang Duan, Hengrong Lan, Meng Zhou, and Fei Gao. "Review of Low-Cost Photoacoustic Sensing and Imaging Based on Laser Diode and Light-Emitting Diode." Sensors 18, no. 7 (2018): 2264. http://dx.doi.org/10.3390/s18072264.

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Photoacoustic tomography (PAT), a promising medical imaging method that combines optical and ultrasound techniques, has been developing for decades mostly in preclinical application. A recent trend is to utilize the economical laser source to develop a low-cost sensing and imaging system, which aims at an affordable solution in clinical application. These low-cost laser sources have different modulation modes such as pulsed modulation, continuous modulation and coded modulation to generate different profiles of PA signals in photoacoustic (PA) imaging. In this paper, we review the recent devel

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Tan, Yuran, Bingting Zha, Junyang Weng, and Mingxi Chen. "Research on laser detection method against smoke and dust interference based on polarization modulation." Journal of Physics: Conference Series 2891, no. 14 (2024): 142028. https://doi.org/10.1088/1742-6596/2891/14/142028.

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Abstract Pulsed laser detection is widely utilized in various fields due to its high accuracy and excellent directionality. However, the presence of smoke and dust particles can interfere with laser detection, leading to misidentification or missed targets. Existing studies have indicated that smoke and dust particles can depolarize polarized light, providing a potential means for mitigating smoke interference. Despite this, current research lacks systematic analysis of the transmission characteristics of different polarization states in smoky environments, and methods for smoke interference r

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Mikołajczyk, Janusz. "A Comparison Study of Data Link with Medium-Wavelength Infrared Pulsed and CW Quantum Cascade Lasers." Photonics 8, no. 6 (2021): 203. http://dx.doi.org/10.3390/photonics8060203.

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In this paper, a comparison study of a quantum cascade laser used for signal transmission by free-space optics is presented. The main goal is to define the capabilities of medium-wavelength infrared lasers operated in pulsed or continuous wave (cw) mode through testing and analyzing a laboratory setup of a data link operated at wavelengths of 4.5 µm (pulsed, peak power 3 W) and 4.8 µm (cw, average power ~20 mW). In this spectral range, the link budget is also defined by radiation attenuation in the atmosphere (absorption, scattering, and turbulence interaction). The performed measurements defi

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Sanjoh, H., I. Tomita, and Y. Yoshikuni. "Precisely spaced multiwavelength light source using pulsed serrodyne modulation in amplified circulating loop." Electronics Letters 39, no. 4 (2003): 392. http://dx.doi.org/10.1049/el:20030275.

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Tong, Luyang, Changdong Chen, Yangjian Cai, and Lina Zhao. "Pulsed Optical Vortex Array Generation in a Self-Q-Switched Tm:YALO3 Laser." Materials 17, no. 5 (2024): 1144. http://dx.doi.org/10.3390/ma17051144.

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Optical vortex arrays are characterized by specific orbital angular momentums, and they have important applications in optical trapping and manipulation, optical communications, secure communications, and high-security information processing. Despite widespread research on optical vortex arrays, the 2 μm wavelength range remains underexplored. Pulsed lasers at 2 μm are vital in laser medicine, sensing, communications, and nonlinear optic applications. The need for 2 μm-pulsed structured optical vortices, combining the advantages of this wavelength range and optical vortex arrays, is evident. T

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Chen, Fei, Zhao Yang Zhang, and Yao Min Wang. "Investigation of Laser Marking Technology with the Image Mask of Liquid Crystal Display." Applied Mechanics and Materials 43 (December 2010): 633–36. http://dx.doi.org/10.4028/www.scientific.net/amm.43.633.

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In the laser marking process system, a liquid crystal display (LCD) was used as the image mask, which can display dynamically and flexibly the various images by the programmable control. A nanosecond pulsed laser (1064nm) was applied to investigate the characteristic of laser photolithography fabrication technology. The light modulation function of LCD mask was firstly discussed by theory. By observing the graphics morphology with a high-powered optical microscope, it was found that the graphics of laser marking with LCD mask shows that its edges were not ablated but its line inside was ablate

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18

Othman, Ahmed M., Hussein E. Kotb, Yasser M. Sabry, and Diaa Khalil. "Micro-Electro-Mechanical System Fourier Transform Infrared (MEMS FT-IR) Spectrometer Under Modulated–Pulsed Light Source Excitation." Applied Spectroscopy 74, no. 7 (2020): 799–807. http://dx.doi.org/10.1177/0003702819886091.

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Miniaturized Fourier transform infrared (FT-IR) spectrometers suffer from limited optical throughput due to their tiny aperture size. Therefore, coherent wideband sources with high brightness can provide an advantage over the wideband thermal radiation sources. However, the former ones are available based on pulsed operation. In this work, we present and study a miniaturized FT-IR spectrometer with pulsed light sources including chopped thermal source, semiconductor optical amplifier, Q-switched and femtosecond mode-locked laser sources. A system model for the FT-IR spectrometer system under a

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19

Kheradpezhouh, Ehsan, Julian M. C. Choy, Vincent R. Daria, and Ehsan Arabzadeh. "TRPA1 expression and its functional activation in rodent cortex." Open Biology 7, no. 4 (2017): 160314. http://dx.doi.org/10.1098/rsob.160314.

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TRPA1 is a non-selective cation channel involved in pain sensation and neurogenic inflammation. Although TRPA1 is well established in a number of organs including the nervous system, its presence and function in the mammalian cortex remains unclear. Here, we demonstrate the expression of TRPA1 in rodent somatosensory cortex through immunostaining and investigate its functional activation by whole-cell electrophysiology, Ca 2+ imaging and two-photon photoswitching. Application of TRPA1 agonist (AITC) and antagonist (HC-030031) produced significant modulation of activity in layer 5 (L5) pyramida

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Shimizu, Kaoru, Tsuneo Horiguchi, and Yahei Koyamada. "Absolute frequency synthesis of pulsed coherent light waves through phase-modulation active optical feedback." Optics Letters 21, no. 22 (1996): 1824. http://dx.doi.org/10.1364/ol.21.001824.

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21

Puchý, Viktor, František Kováč, Ivan Petryshynets, and Ladislav Falat. "Effect of Microsecond Pulse Laser Modification on Electromagnetic Properties of Grain Oriented Silicon Steel." Materials Science Forum 891 (March 2017): 214–18. http://dx.doi.org/10.4028/www.scientific.net/msf.891.214.

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A microsecond pulsed laser beam was used to local magnetic domain modification of electrical grain oriented silicon steel. It was carried out using three different laser pulse regimes: a single pulse laser regime, a multipulse laser regime and a multipulse laser regime with modulation of laser pulses. The laser processing variables were pulse energy and and number of pulses. The samples were tested for nanohardness and coercivity before and after laser treatment. Light optical microscopy, scanning electron microscopy and magnetic force microscopy were used to observe the cross-sectional profil

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XUAN Hao, 宣浩, 刘永安 LIU Yongan, 强鹏飞 QIANG Pengfei та ін. "基于光电阴极的超快X射线源设计及调制性能研究". ACTA PHOTONICA SINICA 50, № 7 (2021): 195. http://dx.doi.org/10.3788/gzxb20215007.0725001.

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23

Karu, Tiina I., Ludmila V. Pyatibrat, and Galina S. Kalendo. "Cell attachment modulation by radiation from a pulsed light diode (? = 820 nm) and various chemicals." Lasers in Surgery and Medicine 28, no. 3 (2001): 227–36. http://dx.doi.org/10.1002/lsm.1043.

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Yadav, Himani, Sanjeev Seth, and Rekha Mehra. "IR Underwater Wireless Communication: A Review." Journal of Communication Engineering and its Innovations 8, no. 2 (2022): 26–30. http://dx.doi.org/10.46610/jocei.2022.v08i02.005.

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One of the biggest difficulties in the realm of technology is underwater wireless communication. Due to the increase in the number of vehicles and other equipment being used underwater, which need high bandwidth and consequently large capacity for information transfer, underwater wireless information transfer is of great importance. It was put forth and has gotten the most attention in the past 10 years. Although this field has made successive advancements, there has also been a concurrent constraint, which led to the replacement of acoustics with infrared waves (IR). The light emitting diode

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Yang, Nan, Jing Xuan Wang, Lan Tian, and Yong Wang. "Laser Stimulation Control System Design of the Auditory Nerve." Advanced Materials Research 1046 (October 2014): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amr.1046.116.

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Optical stimulation of the inner ear, the cochlea, has been proved as a possible alternative to conventional cochlear implant with the hypothetical improvement of dynamic range and frequency resolution. Moreover, the laser has good directionality character and optical signal between adjacent fibers do not readily interfere. Therefore, cochlear implant based on optical stimulation is promising for further exploration and development. The design of an experimental system for optical stimulation of the cochlea is introduced in this paper. For the important part, the selection of NIR laser and the

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Roy, Ankur, Rigel Cappallo, Silas G. T. Laycock, Dimitris M. Christodoulou, Georgios Vasilopoulos, and Sayantan Bhattacharya. "Modeling the Luminosity-dependent Pulse Profile and Emission Geometry of SMC X-2 during a Giant Outburst." Astrophysical Journal 936, no. 1 (2022): 90. http://dx.doi.org/10.3847/1538-4357/ac82b6.

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Abstract One of the brightest X-ray pulsars in the Small Magellanic Cloud is SMC X-2. During its most recent major outburst in 2015, this transient pulsar displayed significant changes in both its accretion state and magnetosphere, particularly when it entered the low-luminosity regime of subcritical accretion. Polestar is a pulse-profile modeling code that helps in delineating the geometry of the emission as the source evolves past outburst and toward lower-luminosity states. Applying Polestar to XMM-Newton and NuSTAR pulse profiles, we constrained the most likely inclination of the spin axis

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Zhang, Wanqing, Ping Su, Jianshe Ma, Ying Tan, Mali Gong, and Liya Ma. "An Approach to Improve Energy Efficiency during Antimicrobial Blue Light Inactivation: Application of Pulse-Width Modulation Dimming to Balance Irradiance and Irradiation Time." Antibiotics 12, no. 9 (2023): 1431. http://dx.doi.org/10.3390/antibiotics12091431.

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Antimicrobial blue light (aBL) is an effective non-destructive inactivation technique and has received increasing attention. Despite its significance, the existing research has not thoroughly delved into the impacts of irradiance and irradiation time on enhancing energy efficiency during aBL inactivation and the explanation of the enhancement effect of pulse exposure. In this paper, a series of Escherichia coli inactivation experiments with different duty cycles, pulse frequencies, and irradiation times were conducted, and the relative concentrations of reactive oxygen species (ROS) were measu

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Mikhailova, Anna Andreevna, Natalya Borisovna Korchazhkina, Elizaveta Sergeevna Koneva, Tatyana Andreevna Nikonova, and Konstantin Valentinovich Kotenko. "Application of complex medical rehabilitation in patients in the late recovery period after acute cerebrovascular accident." Fizioterapevt (Physiotherapist), no. 3 (May 30, 2022): 55–60. http://dx.doi.org/10.33920/med-14-2206-07.

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Many observations have shown a close relationship between post-stroke spasticity and pain syndrome due to stroke; with regard to that, in 72% of patients, spasticity was accompanied by pain and only 1,5% of patients experienced pain in the absence of spasticity.Purpose of the study: to substantiate the inclusion of combined physiotherapy methods, i. e. low-frequency electrostatic massage and broadband modulation currents, and multimodal physiotherapy methods from the Alpha LED Oxy Light — Spa™ device, in the standard complex of medical rehabilitation to relieve pain and reduce spasticity in th

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Alodan, Sarah A., Justin M. Gorham, Frank W. DelRio, et al. "Room temperature wideband tunable photoluminescence of pulsed thermally annealed layered black phosphorus." Nanophotonics 9, no. 14 (2020): 4253–64. http://dx.doi.org/10.1515/nanoph-2020-0244.

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AbstractNewly explored two-dimensional (2D) materials have shown promising optical properties, owning to the tunable band gap of the layered material with its thickness. A widely used method to achieve tunable light emission (or photoluminescence) is through thickness modulation, but this can only cover specific wavelengths. This approach limits the development of tunable optical devices with high spectral resolution over a wide range of wavelengths. Here, we report wideband tunable light emission of exfoliated black phosphorus nanosheets via a pulsed thermal annealing process in ambient condi

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Huang, Ziliang, Yiqian Wu, Molly E. Allen, et al. "Engineering light-controllable CAR T cells for cancer immunotherapy." Science Advances 6, no. 8 (2020): eaay9209. http://dx.doi.org/10.1126/sciadv.aay9209.

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T cells engineered to express chimeric antigen receptors (CARs) can recognize and engage with target cancer cells with redirected specificity for cancer immunotherapy. However, there is a lack of ideal CARs for solid tumor antigens, which may lead to severe adverse effects. Here, we developed a light-inducible nuclear translocation and dimerization (LINTAD) system for gene regulation to control CAR T activation. We first demonstrated light-controllable gene expression and functional modulation in human embryonic kidney 293T and Jurkat T cell lines. We then improved the LINTAD system to achieve

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Narayanan, C., A. B. Buckman, I. Busch-Vishniac, and W. Wang. "Position dependence of the transient response of a position-sensitive detector under periodic pulsed light modulation." IEEE Transactions on Electron Devices 40, no. 9 (1993): 1688–94. http://dx.doi.org/10.1109/16.231576.

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Agiotis, Leonidas, and Michel Meunier. "Nonlinear thermal lensing of high repetition rate ultrafast laser light in plasmonic nano-colloids." Nanophotonics 11, no. 5 (2022): 1051–62. http://dx.doi.org/10.1515/nanoph-2021-0775.

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Abstract We report on experimental observations of phenomenological self-trapping in plasmonic colloids of varying plasmon peaks in the visible/near infrared. A femtosecond (fs) oscillator is used in both pulsed (35 fs, 76 MHz) and continuous wave (cw) operation for comparison. We show that for both modes and for all examined colloids (and under typically applied external focusing conditions in self-trapping studies in colloidal media) nonlinear propagation is governed by thermal defocusing of the focused beam, which precedes the steady-state regime reached by particle diffusion, even far from

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Iwata, Tetsuo, Ritsuki Ito, Yasuhiro Mizutani, and Tsutomu Araki. "Autoregressive-Model-Based Fluorescence-Lifetime Measurements by Phase-Modulation Fluorometry Using a Pulsed-Excitation Light Source and a High-Gain Photomultiplier Tube." Applied Spectroscopy 63, no. 11 (2009): 1256–61. http://dx.doi.org/10.1366/000370209789806911.

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We propose a novel method for measuring fluorescence lifetimes by use of a pulsed-excitation light source and an ordinary or a high-gain photomultiplier tube (PMT) with a high-load resistor. In order to obtain the values of fluorescence lifetimes, we adopt a normal data-processing procedure used in phase-modulation fluorometry. We apply an autoregressive (AR)-model-based data-analysis technique to fluorescence- and reference-response time-series data obtained from the PMT in order to derive plural values of phase differences at a repetition frequency of the pulsed-excitation light source and i

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Ханин, Ю. Н., та Е. Е. Вдовин. "Квантовые осцилляции релаксации фотопроводимости в p-i-n-гетеродиодах GaAs/InAs/AlAs". Физика и техника полупроводников 52, № 6 (2018): 591. http://dx.doi.org/10.21883/ftp.2018.06.45921.8679.

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AbstractThe photoconductivity and its relaxation characteristics in tunneling p – i – n GaAs/AlAs heterostructures under pulsed illumination is studied. Quantum oscillations in the photoconductivity are detected depending on the bias voltage with the period independent of the light wavelength, as well as an oscillating component of the relaxation curves caused by modulation of the recombination rate at the edge of a triangular quantum well in the undoped i layer, as in the case of photoconductivity oscillations. The common nature of oscillations of the steady-state photoconductivity and relaxa

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López-Vidrier, J., S. Gutsch, O. Blázquez, et al. "Modulation of the electroluminescence emission from ZnO/Si NCs/p-Si light-emitting devices via pulsed excitation." Applied Physics Letters 110, no. 20 (2017): 203104. http://dx.doi.org/10.1063/1.4983722.

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Farooq, Tayyab, Xiuru Wu, Sheng Yan, and Hui Fang. "Multiwavelength Photoacoustic Doppler Flowmetry of Living Microalgae Cells." Biosensors 14, no. 8 (2024): 397. http://dx.doi.org/10.3390/bios14080397.

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Photoacoustics can provide a direct measurement of light absorption by microalgae depending on the photosynthesis pigment within them. In this study, we have performed photoacoustic flowmetry on living microalgae cells to measure their flow characteristics, which include flow speed, flow angle, flow direction, and, more importantly, the photoacoustic absorption spectrum, all by observing the photoacoustic Doppler power spectra during their flowing state. A supercontinuum pulsed laser with a high repetition frequency is used as the light source: through intensity modulation at a specified frequ

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Duan Yufei, 段雨飞, 李峰 Li Feng, 杨直 Yang Zhi та ін. "基于液晶空间光调制器进行光谱调制的飞秒啁啾脉冲放大系统". Chinese Journal of Lasers 48, № 11 (2021): 1101001. http://dx.doi.org/10.3788/cjl202148.1101001.

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Mikhailova, A. A., E. S. Koneva, T. A. Nikonova, and K. V. Kotenko. "Evaluation of the effect of patient-oriented programs on functional activity in patients after cerebrovascular accident at the late stage of medical rehabilitation." Fizioterapevt (Physiotherapist), no. 4 (July 30, 2022): 48–53. http://dx.doi.org/10.33920/med-14-2208-06.

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The consequences of a stroke are manifested by a number of unfavorable functional disorders of the motor apparatus, which leads to a significant deterioration in the patients’ quality of life. In this regard, the prevention of the development of disability and the reduction of the severity of the patients’ condition should come to the fore when creating rehabilitation programs to ensure maximum recovery of functional activity, as well as mental, professional and social adaptation of patients. Material and methods: 120 patients after acute cerebrovascular accident with movement disorders in the

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Mikhailova, Anna A., Natalia B. Korchazhkina, Elizaveta S. Koneva, and Konstantin V. Kotenko. "Some features of the effect of different methods of medical rehabilitation on the intensity of pain syndrome in patients after an ischemic stroke in the late recovery period." Russian Journal of Physiotherapy, Balneology and Rehabilitation 21, no. 3 (2022): 183–89. http://dx.doi.org/10.17816/rjpbr108078.

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BACKGROUND: All over the world, scientific research is being actively conducted aimed at the prevention, treatment and rehabilitation of patients with cerebrovascular pathology, but acute cerebrovascular accidents still remain an acute medical and social problem in the world. Post-stroke complications include pain in the upper limb, which affects the performance of simple movements, reduces the level of daily life activity and, as a result, the quality of life of patients. AIM: to evaluate the effectiveness of the influence of various complexes of medical rehabilitation on the intensity

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Scherer, Andreas, Berk Yildirim, and Malte Drescher. "The effect of the zero-field splitting in light-induced pulsed dipolar electron paramagnetic resonance (EPR) spectroscopy." Magnetic Resonance 4, no. 1 (2023): 27–46. http://dx.doi.org/10.5194/mr-4-27-2023.

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Abstract. Laser-induced magnetic dipole (LaserIMD) spectroscopy and light-induced double electron–electron resonance (LiDEER) spectroscopy are important techniques in the emerging field of light-induced pulsed dipolar electron paramagnetic resonance (EPR) spectroscopy (light-induced PDS). These techniques use the photoexcitation of a chromophore to the triplet state and measure its dipolar coupling to a neighboring electron spin, which allows the determination of distance restraints. To date, LaserIMD and LiDEER have been analyzed with software tools that were developed for a pair of two S=1/2

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Guo, Haowen, Chunyan Jia, Yongping Yao, et al. "Nonlinear Optical Saturable Absorption Properties of 2D VP Nanosheets and Application as SA in a Passively Q-Switched Nd:YVO4 Laser." Materials 17, no. 11 (2024): 2585. http://dx.doi.org/10.3390/ma17112585.

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Two-dimensional (2D) violet phosphorus (VP) plays a significant role in the applications of photonic and optoelectronic devices due to its unique optical and electrical properties. The ultrafast carrier dynamics and nonlinear optical absorption properties were systematically investigated here. The intra- and inter-band ultrafast relaxation times of 2D VP nanosheets were measured to be ~6.83 ps and ~62.91 ps using the pump–probe method with a probe laser operating at 1.03 μm. The nonlinear absorption coefficient βeff, the saturation intensity Is, the modulation depth ΔR, and the nonsaturable lo

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I. Hammadi, Yousif, and Tahreer S. Mansour. "A Simple and Efficient Method to Fabricate Graphene 2D Nanomaterial into a thin Film to Serve as a Saturable a bsorber for Fiber Laser Application." International Journal of Engineering & Technology 7, no. 4.15 (2018): 298. http://dx.doi.org/10.14419/ijet.v7i4.15.23011.

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A passively pulsed fiber laser using saturable absorbers such as graphene has been increased dramatically in recent years. Up to now, researchers have been proposed many methods to fabricate graphene saturable absorber such as (evanescent coupling structure, electrochemical exfoliation, and mechanical exfoliation) for light pulse generation in a fiber laser. However, each of these methods has got some limitations which reduce the saturable absorber performance and restrict its range of applications. In this paper, we propose a simple but very efficient fabrication way of graphene saturable abs

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Saravanamuttu, Kalaichelvi, Xin Min Du, S. Iraj Najafi, and Mark P. Andrews. "Article." Canadian Journal of Chemistry 76, no. 11 (1998): 1717–29. http://dx.doi.org/10.1139/v98-176.

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The solution sol-gel method is used to produce thin films of photosensitive hybrid organic-inorganic glass on silicon. Glasses consisted of photoinitiator, methacryloxypropyltrimethoxysilane, methacrylic acid, and zirconium oxide. Clear, low optical loss films are obtained, indicating nanophase homogeneity in the samples. The nanocomposite films are shown to be suitable for fabricating optical components such as ridge wave guides and Bragg diffraction gratings. The increase in the refractive index of the glass relative to the surrounding material during photolithographic processing is identifi

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Kondo, Ryosuke, Ayumu Yabutani, Tomoya Omori, et al. "Demonstration of ultraviolet-B AlGaN-based laser diode operation with a peak light output power of 150 mW by improving injection efficiency through polarization charge modulation." Applied Physics Letters 121, no. 25 (2022): 253501. http://dx.doi.org/10.1063/5.0135033.

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In this study, AlGaN-based ultraviolet-B band laser diodes with 150-mW peak output power in pulsed operation were demonstrated at room temperature. The oscillation wavelength, differential quantum efficiency, and slope efficiency of a laser diode were 300 nm, 3.6%, and 0.15 W/A, respectively. These results were obtained by increasing the injection efficiency and decreasing the positive fixed polarization charge formed at the interface between a p-side waveguide layer and an electron blocking layer when polarization doping is formed in a p-AlGaN cladding layer.

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Li, Ming, Shubing Li, Menghan Deng, et al. "Low-loss strong index modulated ultra-thermally stable optical phase-change material for broadband nonvolatile photonics." Journal of Applied Physics 133, no. 5 (2023): 053101. http://dx.doi.org/10.1063/5.0120033.

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Optical phase change materials (O-PCMs) have attracted increasing attention and provide promising solutions for non-volatile reconfigurable photonics due to their large index contrast and non-volatile switching characteristics. In this work, we have explored the optical phase change properties of a dozen different O-PCMs and established the corresponding gene bank. Among these O-PCMs, Ge[Formula: see text]Sb[Formula: see text]Se[Formula: see text]Te[Formula: see text] (G1S2S3T1) films exhibit unprecedented low-loss, strong light modulation capability, and ultra-thermal stability capability, wh

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Xia, Zhiying, Bin Ni, Ruijie Hou, et al. "Temporal Evolution of Refractive Index Induced by Short Laser Pulses Accounting for Both Photoacoustic and Photothermal Effects." Applied Sciences 12, no. 12 (2022): 6256. http://dx.doi.org/10.3390/app12126256.

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Materials such as silicon, copper, gold, and aluminum exhibit strong absorption and scattering characterization under short-pulsed laser irradiation. Due to the photoelastic effect and thermoelastic relaxation, the focal area may induce a local modulation in the refractive index, which can be detected with the intensity reflection coefficient perturbation. Normally, the thermal effect causes a weak refractive index change and is negligible, compared with the pressure-induced effect in most photoacoustic analytical systems. In this study, we present a theoretical model with the whole process of

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Sun, Xiaoli, Yuanyuan Wang, Bingzheng Yan, et al. "Stoichiometric modulation on optical nonlinearity of 2D MoS_xSe_2−x alloys for photonic applications." Nanophotonics 10, no. 18 (2021): 4623–35. http://dx.doi.org/10.1515/nanoph-2021-0474.

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Abstract The composition-engineered band structures of two-dimensional (2D) ternary transition-metal dichalcogenides (TMDCs) semiconductor alloys directly dominate their electronic and optical properties. Herein, in this paper, a detailed theoretical and experimental study on the composition-dependent nonlinear optical properties of 2D MoS x Se2−x alloys was carried out. The first-principles calculations were performed to investigate the compositionally modulated properties of monolayer 2D MoS x Se2−x (x = 0.25, 0.5, 1.0, 1.5, and 1.75) in terms of the carrier effective mass, carrier density a

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Sacca, Valeria, Nasim Maleki, Ya Wen, Sierra Hodges, and Jian Kong. "Modulation Effects of Repeated Transcranial Direct Current Stimulation at the Dorsolateral Prefrontal Cortex: A Pulsed Continuous Arterial Spin Labeling Study." Brain Sciences 13, no. 3 (2023): 395. http://dx.doi.org/10.3390/brainsci13030395.

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Transcranial direct current stimulation (tDCS) is a promising non-invasive method to modulate brain excitability. The aim of this study was to better understand the cerebral blood flow (CBF) changes during and after repeated tDCS at the right dorsolateral prefrontal cortex (DLPFC) in healthy participants using pulsed continuous arterial spin labeling (pCASL). Elucidating CBF changes associated with repeated tDCS may shed light on the understanding of the mechanisms underlying the therapeutic effects of tDCS. tDCS was applied for three consecutive days for 20 min at 2 mA, and MRI scans were per

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Wang Pu, Bai Zeng-Liang, and Chang Li-Wei. "The Influence of Source Intensity Errors in Unidimensional Gaussian Modulation Continuous-Variable Quantum Key Distribution." Acta Physica Sinica 74, no. 9 (2025): 0. https://doi.org/10.7498/aps.74.20250025.

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Unidimensional Gaussian modulation continuous-variable quantum key distribution (UD CV-QKD) uses only one modulator to encode information, which has the advantages of low implementation cost and low random number consumption, and is attractive for the future construction of miniaturized and low-cost large-scale quantum communication networks. However, in the actual application of the protocol, the intensity fluctuation of the source pulsed light, device defects, and external environmental interference maybe lead to the generation of source intensity errors, which affect the realistic security

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Baldassarro, Vito Antonio, Giuseppe Alastra, Luca Lorenzini, Luciana Giardino, and Laura Calzà. "Photobiomodulation at Defined Wavelengths Regulates Mitochondrial Membrane Potential and Redox Balance in Skin Fibroblasts." Oxidative Medicine and Cellular Longevity 2023 (August 24, 2023): 1–13. http://dx.doi.org/10.1155/2023/7638223.

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Starting from the discovery of phototherapy in the beginning of the last century, photobiomodulation (PBM) has been defined in late 1960s and, since then, widely described in different in vitro models. Robust evidence indicates that the effect of light exposure on the oxidative state of the cells and on mitochondrial dynamics, suggesting a great therapeutic potential. The translational scale-up of PBM, however, has often given contrasting and confusing results, mainly due to light exposure protocols which fail to adequately control or define factors such as emitting device features, emitted li

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