Results 11 to 20 of about 134,221 (268)
Remote Sensing, 2023 Wind parameters play a vital role in studying atmospheric dynamics and climate change. In this study, a vehicle-mounted coherent wind measurement Lidar (CWML) with a wavelength of 1.55 µm is demonstrated based on a four-beam vertical azimuth display (VAD)
Xiaojie Zhang +4 more
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Photonics, 2023 Almost all of the beams under propagation are believed to suffer severe distortion when the source coherence deteriorates, due to the optical diffraction.
Yuefeng Zhao +5 more
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Study of Mixed Pollution of Haze and Dust in Jinan Based on LiDAR
Photonics, 2022 From 26 March to 30 March 2021, a severe mixed haze and dust pollution process occurred in Jinan, China. Ground light detection and ranging (LiDAR) and satellite radar were used to observe and analyze the mixed pollution. In this study, a variety of data,
Yuefeng Zhao +5 more
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Wavelength-Tunable Nonlinear Mirror Mode-Locked Laser Based on MgO-Doped Lithium Niobate
Crystals, 2020 We present a high-power, wavelength-tunable picosecond Yb3+: CaGdAlO4 (Yb:CALGO) laser based on MgO-doped lithium niobate (MgO:LN) nonlinear mirror mode locking. The output wavelength in the continuous wave (CW) regime is tunable over a 45 nm broad range.
Lina Zhao +4 more
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Nanomaterials, 2021 A high Q-factor of the nanocavity can effectively reduce the threshold of nanolasers. In this paper, a modified nanostructure composed of a silver grating on a low-index dielectric layer (LID) and a high-index dielectric layer (HID) was proposed to ...
Xin Zhang +5 more
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Toward a Corrected Knife-Edge-Based Reconstruction of Tightly Focused Higher Order Beams
Frontiers in Physics, 2020 The knife-edge method is an established technique for profiling of even tightly focused light beams. However, the straightforward implementation of this method fails if the materials and geometry of the knife-edges are not chosen carefully or, in ...
Sergej Orlov +8 more
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Second-Order Statistics of Self-Splitting Structured Beams in Oceanic Turbulence
Photonics, 2023 Free-space optical communication is restricted by random media-stimulated beam degradation. However, partially coherent structured beams modulated by the coherence structure can potentially mitigate this negative effect. By employing the extended Huygens–
Liming Liu +6 more
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Adaptive dictionary learning based on local configuration pattern for face recognition
EURASIP Journal on Advances in Signal Processing, 2020 Sparse representation based on classification and collaborative representation based classification with regularized least square has been successfully used in face recognition.
Dongmei Wei +5 more
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Remote Sensing, 2023 This paper examines the effects of temperature and humidity on the absorption spectrum and concentration of nitrous oxide (N2O) using a compact, portable open optical-path gas detection sensor system.
Jiahong Chen +7 more
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Method to evaluate errors of Mie-Lidar in the transition zone with a dual CCD laser system
Results in Physics, 2022 Mie Scattering Light Detection and Ranging (Mie-Lidar) is the most frequently used tool for obtaining the vertical profile of aerosol extinction coefficients. However, Mie-Lidar has an area that is not fully overlapping (called a transition zone) several
Yue-Feng Zhao +7 more
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