Log in

Relevant bibliographies by topics / Ground-based lasers / Journal articles

To see the other types of publications on this topic, follow the link: Ground-based lasers.

Journal articles on the topic 'Ground-based lasers'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Ground-based lasers.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Denker, Boris, Peter Fjodorow, Mikhail Frolov та ін. "Rare-Earth-Doped Selenide Glasses as Laser Materials for the 5–6 μm Spectral Range". Photonics 10, № 12 (2023): 1323. http://dx.doi.org/10.3390/photonics10121323.

Full text

Abstract:

This paper provides an overview of mid-infrared lasers based on rare-earth-ion-doped selenide glasses. Laser action was demonstrated at the transitions between the first excited and the ground levels of Ce3+, Pr3+, Nd3+ and Tb3+ ions. The highest output parameters for bulk glass lasers (over 40 mJ of output energy) and wavelength tuning in the range of 4.6–5.6 microns were obtained with Ce3+-doped glass. The highest output parameters for fiber lasers (150 mW at 5.1–5.3 μm under continuous pumping) were demonstrated with Tb3+ ions. The longest lasing wavelengths for any glass laser and tunabili

APA, Harvard, Vancouver, ISO, and other styles

2

Шерняков, Ю. М., Н. Ю. Гордеев, А. С. Паюсов та ін. "Влияние конструкции активной области и волновода на характеристики лазеров на основе структур квантовые ямы-точки InGaAs/GaAs". Физика и техника полупроводников 55, № 3 (2021): 256. http://dx.doi.org/10.21883/ftp.2021.03.50604.9547.

Full text

Abstract:

We study edge-emitting lasers with the active area based on novel InGaAs/GaAs quantum heterostructures of transitional dimensionality referred to as quantum well-dots, which are intermediate in properties between quantum wells and quantum dots. We show that the rate of the lasing wavelength blue-shift occurring with the reduction in cavity length decreases with an increase in the number of quantum well-dot layers in the active region and the optical confinement factor. In the laser based on 10 quantum well-dot layers, the position of the lasing wavelength remains in the optical region correspo

APA, Harvard, Vancouver, ISO, and other styles

3

Bennett, J. C., J. Sang, C. H. Smith, and K. Zhang. "Accurate orbit predictions for debris orbit manoeuvre using ground-based lasers." Advances in Space Research 52, no. 11 (2013): 1876–87. http://dx.doi.org/10.1016/j.asr.2013.08.029.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Peng, Jiankang, Liufeng Li, and Lisheng Chen. "A spaceborne neodymium-doped yttrium aluminum garnet laser with nonplanar-ring-oscillator configuration." International Journal of Modern Physics A 36, no. 11n12 (2021): 2140007. http://dx.doi.org/10.1142/s0217751x21400078.

Full text

Abstract:

Due to their excellent noise performance and technical maturity, ultra-stable continuous-wave neodymium-doped yttrium aluminum garnet lasers are one of the major light sources in a series of precision measurements such as ground and space-based gravitational wave detection, inter-satellite laser ranging and coherent optical communication. As the first step of developing an ultra-stable spaceborne laser, we carried out the design, development and environmental test of an all-solid-state Nd:YAG NPRO spaceborne laser. The laser deliveries 11.48 mW of optical power at 1064.405 nm, exhibits intensi

APA, Harvard, Vancouver, ISO, and other styles

5

Duhovnik, Alesya, Sergey Voinash, Marat Kalimullin, Ilnur Khusnutdinov, Ramil Zagidullin, and Dinara Zalyakaeva. "Application of unmanned aircraft vehicles and techniques ground laser scanning for measurement of dimensional and quality indicators of tree stand." E3S Web of Conferences 480 (2024): 03012. http://dx.doi.org/10.1051/e3sconf/202448003012.

Full text

Abstract:

Currently, the use of measuring methods and laser scanning tools is one of the most relevant and priority areas for solving the problems of monitoring and evaluation of forest plantations. Such measurement can be performed independently or in combination with aerial video shooting, and can also be carried out by ground-based studies on test areas. According to a number of indicators, laser scanning surpasses others known today, such as aerial photography, earth sounding, etc., remote methods for assessing the qualitative and quantitative characteristics of the forest fund. The use of aerial an

APA, Harvard, Vancouver, ISO, and other styles

6

Gozzard, David R., Shane Walsh, and Till Weinhold. "Vulnerability of Satellite Quantum Key Distribution to Disruption from Ground-Based Lasers." Sensors 21, no. 23 (2021): 7904. http://dx.doi.org/10.3390/s21237904.

Full text

Abstract:

Satellite-mediated quantum key distribution (QKD) is set to become a critical technology for quantum-secure communication over long distances. While satellite QKD cannot be effectively eavesdropped, we show it can be disrupted (or ‘jammed’) with relatively simple and readily available equipment. We developed an atmospheric attenuation and satellite optical scattering model to estimate the rate of excess noise photons that can be injected into a satellite QKD channel by an off-axis laser, and calculated the effect this added noise has on the quantum bit error rate. We show that a ground-based l

APA, Harvard, Vancouver, ISO, and other styles

7

Jumper, George Y., Joshua J. Holladay, Melissa K. Wiechert, and William A. Seggel. "Impact of Thrust Alignment on Orbital Debris Removal by Ground-Based Lasers." Journal of Spacecraft and Rockets 49, no. 2 (2012): 261–67. http://dx.doi.org/10.2514/1.a32059.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

MARCHENKO, L. A., and A. I. KUTYREV. "TECHNICAL AND TECHNOLOGICAL ASPECTS OF LASER WEEDING OF PLANTS." Elektrotekhnologii i elektrooborudovanie v APK 71 (2024): 3–11. http://dx.doi.org/10.22314/2658-4859-2024-71-3-3-11.

Full text

Abstract:

The creation of technologies and autonomous robots for laser weeding of agricultural crops is a promising and relevant direction in the fight against weeds, which will allow for high-precision and targeted processing of crops without the use of herbicides. (Research Purpose) The research purpose is analyzing technologies and technical means for laser weeding of plants. (Materials and methods) Using the aspect approach, the analysis of domestic and foreign scientific publications on the use of laser technologies in agricultural practice was carried out. (Results and discussion) It has been esta

APA, Harvard, Vancouver, ISO, and other styles

9

Barna, A., I. B. Földes, Z. Gingl, and R. Mingesz. "Compact Energy Measuring System for Short Pulse Lasers." Metrology and Measurement Systems 20, no. 2 (2013): 183–90. http://dx.doi.org/10.2478/mms-2013-0016.

Full text

Abstract:

Abstract In experiments with short-pulse lasers the measurement control of the energy of the laser pulse is of crucial importance. Generally it is difficult to measure the amplitude of the pulses of short-pulse lasers using electronic devices, their response time being longer than the duration of the laser pulses. The electric response of the detector is still too fast to be directly digitized therefore a peak-hold unit can be used to allow data processing for the computer. In this paper we present a device which measures the energy of UV short (fs) pulses shot-byshot, digitizes and sends the

APA, Harvard, Vancouver, ISO, and other styles

10

Phipps, Claude. "Lisk-Broom: A laser concept for clearing space debris." Laser and Particle Beams 13, no. 1 (1995): 33–41. http://dx.doi.org/10.1017/s0263034600008831.

Full text

Abstract:

So-called “space junk” forced a change of plan for a recent Shuttle mission. However, ground-based lasers with atmospheric-turbulence-compensating beam directors represent a singularly effective method of de-orbiting space junk, because they use cheap Earth-based power, and because they lend themselves to rapid retargeting. Plasma physics and lasertarget interaction theory dictate the laser parameters for a particular mission. We will discuss a practical laser system and beam director with 20-kW average power at 0.5-µm wavelength that is capable of clearing most low-Earth-orbit objects with ma

APA, Harvard, Vancouver, ISO, and other styles

11

Pirri, Angela, Roman N. Maksimov, Jiang Li, Matteo Vannini, and Guido Toci. "Achievements and Future Perspectives of the Trivalent Thulium-Ion-Doped Mixed-Sesquioxide Ceramics for Laser Applications." Materials 15, no. 6 (2022): 2084. http://dx.doi.org/10.3390/ma15062084.

Full text

Abstract:

This paper is devoted to reviewing the latest results achieved in solid-state lasers based on thulium-doped mixed-sesquioxide ceramics, i.e., (Lu,Sc,Y)2O3. The near- and mid-infrared regions are of interest for many applications, from medicine to remote sensing, as they match molecular fingerprints and cover several atmospheric transparency windows. These matrices are characterized by a strong electron–phonon interaction—which results in a large splitting of the ground state—and by a spectral broadening of the optical transition suitable for developing tunable and short-pulse lasers. In partic

APA, Harvard, Vancouver, ISO, and other styles

12

Park, Chan Yik, Chang Min Cho, and Seung Moon Jun. "Structural Damage Monitoring of a Composite Wing Using Multiple Types of Sensors." Advanced Materials Research 123-125 (August 2010): 907–10. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.907.

Full text

Abstract:

This paper outlines an ongoing SHM project called KASHMOS where the damage detection in composite wing structures using multiple sensors is investigated. The test bed is a composite UAV wing section and the ground structural tests are being performed to evaluate developed systems. Different kinds of damage modes in prearranged areas are intentionally induced. Optical fiber sensors, piezo-electric active sensors and Q-switched pulse lasers are utilized for detecting the damage and monitoring the integrity of the wing structure. Strain-based, impedance-based, and ultrasonic-wave-based damage mon

APA, Harvard, Vancouver, ISO, and other styles

13

Kanitz, Thomas, Alessandra Ciapponi, Alessia Mondello, et al. "ESA’s Lidar Missions Aeolus and EarthCARE." EPJ Web of Conferences 237 (2020): 01006. http://dx.doi.org/10.1051/epjconf/202023701006.

Full text

Abstract:

ESAs Earth Explorer Aeolus was launched in August 2018. Aboard the first spaceborne wind lidar ALADIN (Atmospheric LAser Doppler INstrument) was switched on in early September 2018 and demonstrated the capability to provide atmospheric wind profiles globally from particle and molecular backscatter. In doing so, it will contribute to the improvement in numerical weather prediction (NWP) and the understanding of global dynamics. At the same, it is a major step for powerful and frequency stabilized ultraviolet (UV) lasers for space applications. In parallel, ESA and its partners continue the deve

APA, Harvard, Vancouver, ISO, and other styles

14

Naghshvarianjahromi, Mahdi, Shiva Kumar, and M. Jamal Deen. "Free Space Ground to Satellite Optical Communications Using Kramers–Kronig Transceiver in the Presence of Atmospheric Turbulence." Sensors 22, no. 9 (2022): 3435. http://dx.doi.org/10.3390/s22093435.

Full text

Abstract:

Coherent detection provides the optimum performance for free space optical (FSO) communication systems. However, such detection systems are expensive and require digital phase noise compensation. In this paper, the transmission performance of long-haul FSO system for ground-to-satellite communication based on a Kramers–Kronig (KK) transceiver is evaluated. KK transceivers utilize inexpensive direct detection receivers and the signal phase is retrieved from the received current using the well-known KK relations. KK transceivers are not sensitive to the laser phase noise and, hence, inexpensive

APA, Harvard, Vancouver, ISO, and other styles

15

Rees, Emily Rose, Andrew R. Wade, Andrew J. Sutton, and Kirk McKenzie. "Absolute Frequency Readout of Cavity against Atomic Reference." Remote Sensing 14, no. 11 (2022): 2689. http://dx.doi.org/10.3390/rs14112689.

Full text

Abstract:

Future space-based geodesy missions such as the Mass Change Mission and the Next Generation Gravity Mission are expected to rely on laser ranging as their primary instrument. Short-term laser frequency stability has previously been achieved on the GRACE Follow On mission by stabilizing the lasers to an optical cavity. The development of a technique to provide long-term laser frequency stability is expected to be required. We have previously demonstrated a technique to track long-term frequency changes by using measurements of the optical cavity’s free spectral range. In this paper, we calibrat

APA, Harvard, Vancouver, ISO, and other styles

16

Scharring, Stefan, and Jürgen Kästel. "Can the Orbital Debris Disease Be Cured Using Lasers?" Aerospace 10, no. 7 (2023): 633. http://dx.doi.org/10.3390/aerospace10070633.

Full text

Abstract:

Ground-based high-power lasers are, in principle, able to de-orbit any kind of space debris object from the low Earth orbit (LEO) by remotely inducing laser-ablative momentum. However, the assessment of efficiency and operational safety depends on many factors, like atmospheric constraints or the risk of debris disintegration during irradiation. We analyze laser momentum for a great variety of target geometries and sizes and—for the first time in a large-scale simulation—include thermal constraints in the laser irradiation configuration. Using a coherently coupled 100 kJ laser system at 1030 n

APA, Harvard, Vancouver, ISO, and other styles

17

Rosen, Leonard C., and James Ipser. "Scattering of ground based lasers by aerosols in an atmosphere with enhanced particle content." Atmospheric Environment. Part A. General Topics 25, no. 11 (1991): 2643–51. http://dx.doi.org/10.1016/0960-1686(91)90181-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Esmiller, Bruno, Christophe Jacquelard, Hans-Albert Eckel, and Edwin Wnuk. "Space debris removal by ground-based lasers: main conclusions of the European project CLEANSPACE." Applied Optics 53, no. 31 (2014): I45. http://dx.doi.org/10.1364/ao.53.000i45.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Toś, Cezary. "The Possibilities of Using the Terrestrial Scanning Data for Classification of Rocks in Limestone Mine “Czatkowice”." Reports on Geodesy and Geoinformatics 97, no. 1 (2015): 80–90. http://dx.doi.org/10.2478/rgg-2014-0013.

Full text

Abstract:

AbstractThis paper presents results of a research of potential utilisation of the intensity of laser beam reflection recorded by ground-based lasers, for an initial classification of rock formations within the Czatkowice Limestone Quarry. As part of the research, spectrometric analysis in visible (VIS), near-infrared (NIR) and Short-wavelength infrared (SWIR) bands was carried out for rock samples typical for the Czatkowice Quarry. Moreover, the rock samples were scanned using equipment working within different wavelengths. The reflected intensity of the laser beam recorded for each rock sampl

APA, Harvard, Vancouver, ISO, and other styles

20

Slavcheva, Gabriela, and Alexey V. Kavokin. "Polarization Control of Optically Pumped Terahertz Lasers." MRS Proceedings 1617 (2013): 199–204. http://dx.doi.org/10.1557/opl.2013.1185.

Full text

Abstract:

ABSTRACTTwo-photon pumping of excited exciton states in semiconductor quantum wells is a tool for realization of ultra-compact terahertz (THz) lasers based on stimulated optical transition between excited 2p and ground 1s exciton state. We show that the probability of two-photon absorption by a 2p-exciton is strongly dependent on the polarization of both photons. Variation of the threshold power for THz lasing by a factor of 5 is predicted by switching from linear to circular pumping. We calculate the polarization dependence of the THz emission and identify photon polarization configurations f

APA, Harvard, Vancouver, ISO, and other styles

21

Lazzaro, Riccardo, and Carlo Bettanini. "Evaluation of Satellite’s Point-Ahead Angle Derived from TLE for Laser Communication." Aerotecnica Missili & Spazio 101, no. 1 (2022): 7–15. http://dx.doi.org/10.1007/s42496-022-00106-9.

Full text

Abstract:

AbstractAdvances in lasers, optics and electronics for Satellite’s optical communication are opening the possibility of very high performance near Earth space links with data rate up to several Gbps. Being the divergence of the laser beam typically of tens of $$\mu$$ μ rad, an extremely high precision pointing is needed to correctly establish and maintain data optical link. In particular, the relative motion between the satellite and the ground station shall be accurately evaluated to estimate how to correct pointing angles for future orbital locations. This correction is made via a point-ahea

APA, Harvard, Vancouver, ISO, and other styles

22

Yao, Z. H., X. Wang, H. M. Chen, et al. "Carrier dynamics and lasing behavior of InAs/GaAs quantum dot lasers with short cavity lengths." Nanotechnology 33, no. 3 (2021): 035201. http://dx.doi.org/10.1088/1361-6528/ac2f5e.

Full text

Abstract:

Abstract The modulation p-doping technique has emerged as an effective way to optimize the carrier dynamics process of quantum dot (QD) structures. Here, the laser structures based on the 1.3 μm multiple-layer InAs/GaAs QD were fabricated with and without modulation p-doping. The carrier relaxation rate was increased after modulation p-doping, as demonstrated by transient absorption spectroscopy. The higher relaxation rate in p-doped QDs could be explained by more rapid carrier–carrier scattering process originating from increasing of the hole quasi-Fermi-level movement that increases the prob

APA, Harvard, Vancouver, ISO, and other styles

23

Li, Xin, Lei Liang, Li Qin, et al. "Development of a High-Power Surface Grating Tunable Distributed-Feedback Bragg Semiconductor Laser Based on Gain-Coupling Effect." Applied Sciences 12, no. 9 (2022): 4498. http://dx.doi.org/10.3390/app12094498.

Full text

Abstract:

Lasers used for space communication, lidar, and laser detection in space-air-ground integration applications typically use a traditional 1550 nm band tunable distributed-feedback Bragg (DFB) semiconductor laser. This has low output power, complex fabrication process, and high fabrication cost. In this paper, we present a gain-coupled surface grating-based 1550 nm DFB semiconductor laser that can be fabricated without the use of secondary epitaxial growth techniques or high-precision lithography. The periodic electrical injection is used to achieve a gain coupling effect. A tapered waveguide is

APA, Harvard, Vancouver, ISO, and other styles

24

Wang JingZhe, Dong FuLong, and Liu Jie. "Dissociation dynamic study of H<sub>2</sub><sup>+</sup> in time-delayed two-color femtosecond lasers." Acta Physica Sinica 73, no. 24 (2024): 0. http://dx.doi.org/10.7498/aps.73.20241283.

Full text

Abstract:

In recent years, the rapid development of ultrashort pulse laser technology has made it possible to regulate the ionization and dissociation dynamics of atoms and molecules. Among them, the microscopic dynamics of molecular dissociation have always been a hot topic. The phenomenon of molecular dissociation caused by the interaction between femtosecond intense laser fields and H<sub>2</sub><sup>+</sup> molecules has attracted widespread attention. Previous theoretical studies on the dissociation of H<sub>2</sub><sup>+</sup> molecules mainly focuse

APA, Harvard, Vancouver, ISO, and other styles

25

Kruk, Edyta, Przemysław Klapa, Marek Ryczek, and Krzysztof Ostrowski. "Influence of DEM Elaboration Methods on the USLE Model Topographical Factor Parameter on Steep Slopes." Remote Sensing 12, no. 21 (2020): 3540. http://dx.doi.org/10.3390/rs12213540.

Full text

Abstract:

Runoff erosion is an important theme in hydrological investigations. Models assessing soil erosion are based on various algorithms that determine the relief coefficient using rasterized digital elevation models (DEMs). For evaluation of soil loss, the most-used model worldwide is the USLE (Universal Soil Loss Equation), where the most essential part is the LS parameter, which is, in turn, generated from two parameters: L (slope length coefficient) and S (slope inclination). The most significant limitation of LS is the difficulty in obtaining the data needed to generate detailed DEMs. We invest

APA, Harvard, Vancouver, ISO, and other styles

26

Lutz, Kolemann, and Terry Trevino. "High energy laser & systems to neutralise stellar coronal mass ejections (CME) plasma." Aeronautics and Aerospace Open Access Journal 8, no. 1 (2024): 1–9. http://dx.doi.org/10.15406/aaoaj.2024.08.00187.

Full text

Abstract:

With CME plasma and shockwave travelling at 600+ km/sec, active methods such as high energy electron lasers (HEL) and mirrors are effective at making contact with ionised atoms in CME. Electrons pulsed from kW to MW laser(s) could polarise ionised atoms such as Fe16+, O7/8+, Mg, He2+,etc to fill valence pairs. As high-FIP atoms are electromagnetically trapped with a higher susceptibility from lower e- density and temperatures, CME plasma clouds can be neutralised, separated, and reduced in velocity trajectory around planet. Study outlines interactions between Electron Laser and CME plasma clou

APA, Harvard, Vancouver, ISO, and other styles

27

Flannigan, Liam, Liam Yoell, and Chang-qing Xu. "Mid-wave and long-wave infrared transmitters and detectors for optical satellite communications—a review." Journal of Optics 24, no. 4 (2022): 043002. http://dx.doi.org/10.1088/2040-8986/ac56b6.

Full text

Abstract:

Abstract There has been a recent surge in interest for optical satellite communication (SatCom) utilizing lasers. It is clear to see why, as optical SatCom is capable of higher speed, lighter weight, higher directionality, and higher efficiency versus their radio-based counterparts. Research into optical SatCom has focused on devices operating in the short-wave infrared (SWIR), which is due to the maturity and commercial availability of such component’s thanks to significant development in terrestrial telecommunications networks. However, SWIR performs poorly in fog and heavy weather, promptin

APA, Harvard, Vancouver, ISO, and other styles

28

Brooke, J. S. A., P. F. Bernath, G. Kirchengast, et al. "Greenhouse gas measurements over a 144 km open path in the Canary Islands." Atmospheric Measurement Techniques 5, no. 9 (2012): 2309–19. http://dx.doi.org/10.5194/amt-5-2309-2012.

Full text

Abstract:

Abstract. A new technique for the satellite remote sensing of greenhouse gases in the atmosphere via the absorption of short-wave infrared laser signals transmitted between counter-rotating satellites in low Earth orbit has recently been proposed; this would enable the acquisition of a long-term, stable, global set of altitude-resolved concentration measurements. We present the first ground-based experimental demonstration of this new infrared-laser occultation method, in which the atmospheric absorption of CO2 near 2.1 μm was measured over a ~144 km path length between two peaks in the Canary

APA, Harvard, Vancouver, ISO, and other styles

29

Safaeinili, A., A. D. W. McKie, and R. C. Addison. "Noncontact Surface-Hardness Measurement Using Laser-Based Ultrasound." MRS Bulletin 21, no. 10 (1996): 53–57. http://dx.doi.org/10.1557/s0883769400031651.

Full text

Abstract:

A noncontact inspection system that uses lasers to both generate and detect ultrasonic waves has been developed at the Rockwell Science Center for the purpose of nondestructively inspecting metallic and composite structures. The laser-based ultrasound (LBU) system was initially developed to inspect large-area composite airframe structures, including the automated inspection of integrally stiffened and complexly curved composite structures. Furthermore the benefits offered by LBU, such as its noncontacting nature and ability to operate at elevated temperatures, have extended its usefulness to a

APA, Harvard, Vancouver, ISO, and other styles

30

FIRSOV, D. A., L. E. VOROBJEV, M. A. BARZILOVICH, et al. "LIGHT EMISSION, ABSORPTION AND AMPLIFICATION IN InAs/GaAs QUANTUM DOTS AND GaAs/AlGaAs QUANTUM WELLS RESULTING FROM OPTICAL PUMPING." International Journal of Nanoscience 06, no. 03n04 (2007): 241–44. http://dx.doi.org/10.1142/s0219581x0700464x.

Full text

Abstract:

Optical phenomena in quantum dot and quantum well nanostructures aimed at the development of mid-infrared lasers based on intraband electron transitions are investigated in the conditions of interband optical pumping. Evolution of photoluminescence spectra and interband light absorption with intensity of interband optical excitation is investigated in InAs / GaAs quantum dot structures. Optically induced intersubband mid-infrared light absorption is studied in undoped tunnel-coupled GaAs / AlGaAs quantum wells. The stabilization of the electron concentration at the ground level of tunnel-coupl

APA, Harvard, Vancouver, ISO, and other styles

31

Salazar, Sean, Cyrus Garner, and Richard Coffman. "Development of a Multimode Field Deployable Lidar Instrument for Topographic Measurements of Unsaturated Soil Properties: Instrument Description." Remote Sensing 11, no. 3 (2019): 289. http://dx.doi.org/10.3390/rs11030289.

Full text

Abstract:

The hydrological and mechanical behavior of soil is determined by the moisture content, soil water (matric) potential, fines content, and plasticity. However, these parameters are often difficult or impractical to determine in the field. Remote characterization of soil parameters is a non-destructive data collection process well suited to large or otherwise inaccessible areas. A ground-based, field-deployable remote sensor, called the soil observation laser absorption spectrometer (SOLAS), was developed to collect measurements from the surface of bare soils and to assess the in-situ condition

APA, Harvard, Vancouver, ISO, and other styles

32

Gazeli, Kristaq, Guillaume Lombardi, Xavier Aubert, Corinne Y. Duluard, Swaminathan Prasanna, and Khaled Hassouni. "Progresses on the Use of Two-Photon Absorption Laser Induced Fluorescence (TALIF) Diagnostics for Measuring Absolute Atomic Densities in Plasmas and Flames." Plasma 4, no. 1 (2021): 145–71. http://dx.doi.org/10.3390/plasma4010009.

Full text

Abstract:

Recent developments in plasma science and technology have opened new areas of research both for fundamental purposes (e.g., description of key physical phenomena involved in laboratory plasmas) and novel applications (material synthesis, microelectronics, thin film deposition, biomedicine, environment, flow control, to name a few). With the increasing availability of advanced optical diagnostics (fast framing imaging, gas flow visualization, emission/absorption spectroscopy, etc.), a better understanding of the physicochemical processes taking place in different electrical discharges has been

APA, Harvard, Vancouver, ISO, and other styles

33

Zirkelbach, Johannes, Masoud Mirzaei, Irena Deperasińska, et al. "High-resolution vibronic spectroscopy of a single molecule embedded in a crystal." Journal of Chemical Physics 156, no. 10 (2022): 104301. http://dx.doi.org/10.1063/5.0081297.

Full text

Abstract:

Vibrational levels of the electronic ground states in dye molecules have not been previously explored at a high resolution in solid matrices. We present new spectroscopic measurements on single polycyclic aromatic molecules of dibenzoterrylene embedded in an organic crystal made of para-dichlorobenzene. To do this, we use narrow-band continuous-wave lasers and combine spectroscopy methods based on fluorescence excitation and stimulated emission depletion to assess individual vibrational linewidths in the electronic ground state at a resolution of ∼30 MHz dictated by the linewidth of the electr

APA, Harvard, Vancouver, ISO, and other styles

34

Disney, M. I., M. Boni Vicari, A. Burt, et al. "Weighing trees with lasers: advances, challenges and opportunities." Interface Focus 8, no. 2 (2018): 20170048. http://dx.doi.org/10.1098/rsfs.2017.0048.

Full text

Abstract:

Terrestrial laser scanning (TLS) is providing exciting new ways to quantify tree and forest structure, particularly above-ground biomass (AGB). We show how TLS can address some of the key uncertainties and limitations of current approaches to estimating AGB based on empirical allometric scaling equations (ASEs) that underpin all large-scale estimates of AGB. TLS provides extremely detailed non-destructive measurements of tree form independent of tree size and shape. We show examples of three-dimensional (3D) TLS measurements from various tropical and temperate forests and describe how the resu

APA, Harvard, Vancouver, ISO, and other styles

35

Mahmoudzadeh, Ahmadreza, Sayna Firoozi Yeganeh, Sara Arezoumand, and Amir Golroo. "3D Pavement Surface Reconstruction Using An RGB-D Sensor." Proceedings 42, no. 1 (2019): 47. http://dx.doi.org/10.3390/ecsa-6-06641.

Full text

Abstract:

Data collection plays an important role in pavement health monitoring, which is usually performed using costly devices, including point-based lasers and laser scanners. The main aim of this study measures pavement characteristics using an RGB-D sensor. By recording the depth and color images simultaneously, the sensor benefits the data fusion. By mounting the sensor on a moving cart, and fixing the vertical distance from the ground, data were collected along 100 m of the asphalt pavement using MATLAB. At each stop point, multiple frames were collected, the central region of interests was store

APA, Harvard, Vancouver, ISO, and other styles

36

Spuler, Scott M., Matthew Hayman, Robert A. Stillwell, Joshua Carnes, Todd Bernatsky, and Kevin S. Repasky. "MicroPulse DIAL (MPD) – a diode-laser-based lidar architecture for quantitative atmospheric profiling." Atmospheric Measurement Techniques 14, no. 6 (2021): 4593–616. http://dx.doi.org/10.5194/amt-14-4593-2021.

Full text

Abstract:

Abstract. Continuous water vapor and temperature profiles are critically needed for improved understanding of the lower atmosphere and potential advances in weather forecasting skill. Ground-based, national-scale profiling networks are part of a suite of instruments to provide such observations; however, the technological method must be cost-effective and quantitative. We have been developing an active remote sensing technology based on a diode-laser-based lidar technology to address this observational need. Narrowband, high-spectral-fidelity diode lasers enable accurate and calibration-free m

APA, Harvard, Vancouver, ISO, and other styles

37

Hofstetter, Daniel, David P. Bour, and Hans Beck. "Proposal for Deep-UV Emission from a Near-Infrared AlN/GaN-Based Quantum Cascade Device Using Multiple Photon Up-Conversion." Crystals 13, no. 3 (2023): 494. http://dx.doi.org/10.3390/cryst13030494.

Full text

Abstract:

We propose the use of an n-doped periodic AlN/GaN quantum cascade structure for the optical up-conversion of multiple near-infrared (near-IR) photons into deep-ultraviolet (deep-UV) radiation. Without applying an external bias voltage, the active region of such a device will (similar to an un-biased quantum cascade laser) resemble a sawtooth-shaped inter-subband structure. A carefully adjusted bias voltage then converts this sawtooth pattern into a ‘quantum-stair’. Illumination with λ = 1.55 µm radiation results in photon absorption thereby lifting electrons from the ground state of each main

APA, Harvard, Vancouver, ISO, and other styles

38

Lei, Liqiao, Timothy A. Berkoff, Guillaume Gronoff, et al. "Retrieval of UVB aerosol extinction profiles from the ground-based Langley Mobile Ozone Lidar (LMOL) system." Atmospheric Measurement Techniques 15, no. 8 (2022): 2465–78. http://dx.doi.org/10.5194/amt-15-2465-2022.

Full text

Abstract:

Abstract. Aerosols emitted from wildfires are becoming one of the main sources of poor air quality on the US mainland. Their extinction in UVB (the wavelength range from 280 to 315 nm) is difficult to retrieve using simple lidar techniques because of the impact of ozone (O3) absorption and the lack of information about the lidar ratios at those wavelengths. Improving the characterization of lidar ratios at the abovementioned wavelengths will enable aerosol monitoring with different instruments and will also permit the correction of the aerosol impact on O3 lidar data. The 2018 Long Island Soun

APA, Harvard, Vancouver, ISO, and other styles

39

Siozos, Panagiotis, Giannis Psyllakis, Peter C. Samartzis, and Michalis Velegrakis. "Autonomous Differential Absorption Laser Device for Remote Sensing of Atmospheric Greenhouse Gases." Remote Sensing 14, no. 3 (2022): 460. http://dx.doi.org/10.3390/rs14030460.

Full text

Abstract:

A ground-based, integrated path, differential absorption (IPDA) light detection device capable of measuring multiple greenhouse gas (GHG) species in the atmosphere is presented. The device was developed to monitor greenhouse gas concentrations in small-scale areas with high emission activities. It is equipped with two low optical power tunable diode lasers in the near-infrared spectral range for the atmospheric detection of carbon dioxide, methane, and water vapors (CO2, CH4 and H2O). The device was tested with measurements of background concentrations of CO2 and CH4 in the atmosphere (Crete,

APA, Harvard, Vancouver, ISO, and other styles

40

Wang, Xinyang, Tianwei Hu, Dekui Li, Kai Guo, Jun Gao, and Zhongyi Guo. "Performances of Polarization-Retrieve Imaging in Stratified Dispersion Media." Remote Sensing 12, no. 18 (2020): 2895. http://dx.doi.org/10.3390/rs12182895.

Full text

Abstract:

We constructed an active imaging model within 10 km of the atmosphere from the satellite to the ground based on Monte Carlo (MC) algorithm, and, because of the inhomogeneous distributions of the scattering particles in atmosphere environment, 10 km atmosphere layer was divided into ten layers in our model. The MC algorithm was used to simulate the transmission process of photons through the atmosphere. By launching lasers of linear polarization states from satellites to ground, the intensity, degree of polarization (DoP), polarization difference (PD), and polarization retrieve (PR) images can

APA, Harvard, Vancouver, ISO, and other styles

41

von Zahn, U., G. von Cossart, J. Fiedler, et al. "The ALOMAR Rayleigh/Mie/Raman lidar: objectives, configuration, and performance." Annales Geophysicae 18, no. 7 (2000): 815–33. http://dx.doi.org/10.1007/s00585-000-0815-2.

Full text

Abstract:

Abstract. We report on the development and current capabilities of the ALOMAR Rayleigh/Mie/Raman lidar. This instrument is one of the core instruments of the international ALOMAR facility, located near Andenes in Norway at 69°N and 16°E. The major task of the instrument is to perform advanced studies of the Arctic middle atmosphere over altitudes between about 15 to 90 km on a climatological basis. These studies address questions about the thermal structure of the Arctic middle atmosphere, the dynamical processes acting therein, and of aerosols in the form of stratospheric background aerosol,

APA, Harvard, Vancouver, ISO, and other styles

42

Bulus, I., J. K. Sheyin, E. Yayock, and A. S. Dalhatu. "Nd3+ CONCENTRATION DEPENDENT OPTICAL FEATURES OF GADOLINIUM BOROPHOSPHO-TELLURITE GLASSES." Open Journal of Physical Science (ISSN: 2734-2123) 1, no. 1 (2020): 1–10. http://dx.doi.org/10.52417/ojps.v1i1.84.

Full text

Abstract:

Improving the optical response of glass host with two or more strong network formers via suitable controlled of rare earth ions is the key issue in the fabrication of optical based glass for solid state lasers and light emitting devices. Hence, we report the Nd3+ concentration dependent on optical parameters such as absorption edge, optical band gap (direct and indirect) and Urbach’s energy of gadolinium borophospho-tellurite glasses with chemical composition of 10Gd2O + 30B2O3 + 20P2O5 + (40-)TeO2 + Nd2O3 (where 0.0 ≤ x ≤ 1.0 mol%). The glass samples were synthesized by convectional melt quen

APA, Harvard, Vancouver, ISO, and other styles

43

Xu, Junhao, Chunjing Yao, Hongchao Ma, Chen Qian, and Jie Wang. "Automatic Point Cloud Colorization of Ground-Based LiDAR Data Using Video Imagery without Position and Orientation System." Remote Sensing 15, no. 10 (2023): 2658. http://dx.doi.org/10.3390/rs15102658.

Full text

Abstract:

With the continuous development of three-dimensional city modeling, traditional close-range photogrammetry is limited by complex processing procedures and incomplete 3D depth information, making it unable to meet high-precision modeling requirements. In contrast, the integration of light detection and ranging and cameras in mobile measurement systems provides a new and highly effective solution. Currently, integrated mobile measurement systems commonly require cameras, lasers, position and orientation system and inertial measurement units; thus, the hardware cost is relatively expensive, and t

APA, Harvard, Vancouver, ISO, and other styles

44

Liu, Hongxin, Chunyu Liu, Peng Xie, and Shuai Liu. "Design of Exterior Orientation Parameters Variation Real-Time Monitoring System in Remote Sensing Cameras." Remote Sensing 16, no. 21 (2024): 3936. http://dx.doi.org/10.3390/rs16213936.

Full text

Abstract:

The positional accuracy of satellite imagery is essential for remote sensing cameras. However, vibrations and temperature changes during launch and operation can alter the exterior orientation parameters of remote sensing cameras, significantly reducing image positional accuracy. To address this issue, this article proposes an exterior orientation parameter variation real-time monitoring system (EOPV-RTMS). This system employs lasers to establish a full-link active optical monitoring path, which is free from time and space constraints. By simultaneously receiving star and laser signals with th

APA, Harvard, Vancouver, ISO, and other styles

45

Bolkas, D., G. Walton, R. Kromer, T. Sichler, and L. Weidner. "A NOVEL APPROACH TO REGISTER MULTI-PLATFORM POINT CLOUDS FOR ROCKFALL MONITORING." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2021 (June 28, 2021): 693–700. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2021-693-2021.

Full text

Abstract:

Abstract. Point cloud produced from technologies such as terrestrial laser scanning (TLS) and photogrammetry (terrestrial and aerial) are widely used in rockfall monitoring applications due to the wealth of data they provide. In such applications, the acquisition and registration of multi-epoch point clouds is necessary. In addition, point clouds can be derived from different sensors (e.g., lasers versus digital cameras) and different platforms (terrestrial versus aerial). Therefore, registration methods should be able to support multi-platform datasets. Currently, registration of multi-platfo

APA, Harvard, Vancouver, ISO, and other styles

46

Lopes, F. J. S., E. Landulfo, and M. A. Vaughan. "Assessment of the CALIPSO Lidar 532 nm version 3 lidar ratio models using a ground-based lidar and AERONET sun photometers in Brazil." Atmospheric Measurement Techniques Discussions 6, no. 1 (2013): 1143–99. http://dx.doi.org/10.5194/amtd-6-1143-2013.

Full text

Abstract:

Abstract. Since the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite first began probing the Earth's atmosphere on 13 June 2006, several research groups dedicated to investigating the atmosphere's optical properties have conducted measurement campaigns to validate the CALIPSO data products. Recently, in order to address the lack of CALIPSO validation studies in the Southern Hemisphere, and especially the South American continent, the Lasers Environmental Applications Research Group at Brazil's Nuclear and Energy Research Institute (IPEN) initiated efforts

APA, Harvard, Vancouver, ISO, and other styles

47

Hasim, Nurhafizah, Md Supar Rohani, Md Rahim Sahar, and Sib Krishna Ghoshal. "Luminescence of Er³⁺/Nd³⁺ Co-Doped Lithium Niobate Tellurite Glass." Materials Science Forum 846 (March 2016): 131–36. http://dx.doi.org/10.4028/www.scientific.net/msf.846.131.

Full text

Abstract:

Achieving tuneable photoluminescence via controlled co-doping of rare earth ions in lithium niobate based glasses are challenging. A series of Er3+/ Nd3+ co-doped tellurite glasses of composition (70-x-y) TeO2 – 15 Li2CO3 – 15 Nb2O5 – (x) Er2O3 – (y) Nd2O3 with x = 0; 1.0 mol % and 0 ≤ y ≤ 1.0 mol % are prepared using melt quenching technique. The influence of co-dopants on the emission properties is analyzed and discussed using partial energy level diagram of rare earth ions. The dopants concentration dependent physical properties such as refractive index, molar volume, density, polarizabilit

APA, Harvard, Vancouver, ISO, and other styles

48

Uemura, Yohei, Toshihiko Yokoyama, Tetsuo Katayama, Shunsuke Nozawa, and Kiyotaka Asakura. "Tracking the Local Structure Change during the Photoabsorption Processes of Photocatalysts by the Ultrafast Pump-Probe XAFS Method." Applied Sciences 10, no. 21 (2020): 7818. http://dx.doi.org/10.3390/app10217818.

Full text

Abstract:

The birth of synchrotron radiation (SR) facilities and X-ray free electron lasers (XFELs) has led to the development of new characterization tools that use X-rays and opened frontiers in science and technology. Ultrafast X-ray absorption fine structure (XAFS) spectroscopy for photocatalysts is one such significant research technique. Although carrier behavior in photocatalysts has been discussed in terms of the band theory and their energy levels in reciprocal space (k-space) based on optical spectroscopic results, it has rarely been discussed where photocarriers are located in real-space (r-s

APA, Harvard, Vancouver, ISO, and other styles

49

Keil, Denise, Stefan Scharring, Erik Klein, et al. "Modification of Space Debris Trajectories through Lasers: Dependence of Thermal and Impulse Coupling on Material and Surface Properties." Aerospace 10, no. 11 (2023): 947. http://dx.doi.org/10.3390/aerospace10110947.

Full text

Abstract:

Environmental pollution exists not only within our atmosphere but also in space. Space debris is a critical problem of modern and future space infrastructure. Congested orbits raise the question of spacecraft disposal. Therefore, state-of-the-art satellites come with a deorbit system in cases of low Earth orbit (LEO) and with thrusters for transferring into the graveyard orbit for geostationary and geosynchronous orbits. No practical solution is available for debris objects that stem from fragmentation events. The present study focuses on objects in LEO orbits with dimensions in the dangerous

APA, Harvard, Vancouver, ISO, and other styles

50

Wang, Qingqing, Zhengmao Wu, Yanfei Zheng, and Guangqiong Xia. "The Effect of Electron Escape Rate on the Nonlinear Dynamics of Quantum Dot Lasers under Optical Feedback." Photonics 10, no. 8 (2023): 878. http://dx.doi.org/10.3390/photonics10080878.

Full text

Abstract:

When theoretically investigating the nonlinear dynamics of quantum dot lasers (QDLs), the parameter value of the electron escape rate (Ce) is sometimes approximated to zero to simplify the calculation. However, the value of Ce is dependent on the energy interval between the ground state (GS) and the excited state (ES) in the conduction band and is affected by the operation temperature. As a result, such simplified approximation treatments may lead to inaccurate results. In this study, after considering the effect of Ce, we investigate the nonlinear dynamics of QDLs with and without optical fee

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!