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Simulation and retrieval for spaceborne aerosol and cloud high spectral resolution lidar of China

Science China Earth Sciences 2022年第3期65卷 570-583页

作者： Feiyue MAO Xi LUO Jie SONG Zhenxin LIANG Wei GONG weibiao chen School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430079China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China Electronic Information School Wuhan UniversityWuhan 430079China Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China

Clouds and aerosols can significantly affect global climate change and the atmospheric environment,and observing them three-dimensionally with high spatial and temporal resolutions is a long-standing *** lidars are effective instruments for the vertical detection of clouds and aerosols *** Mie scattering lidars were successfully launched and widely used,such as the Cloud-Aerosol Lidar with Orthogonal Polarization(CALIOP)and Geoscience Laser Altimeter ***,the retrieval of Mie scattering lidar data is an ill-posed problem that introduces a large *** spaceborne Aerosol and Cloud High Spectral Resolution Lidar(ACHSRL)of China is currently under development and scheduled for launch in the near *** ACHSRL attracted extensive attention,because it can separate Mie and Rayleigh scattering signals and avoid ill-posed *** this study,we conducted ACHSRL signal simulation and retrieval to explore the potential of the ***,we proposed a simplified scheme for retrieving optical parameters,which reduced the number of equations and intermediate variables of the traditional method and avoided false extrema in the backscatter coefficient ***,the experiments showed that the backscatter coefficient retrieval was overestimated owing to the influence of the Poisson noise but can be ***,we examined the feasibility of the strategy of“first retrieving the lidar ratio then retrieving the extinction coefficient”to improve the extinction coefficient *** found that the retrieval error in the simulated cases can be reduced to less than 1%of the original retrieval ***,we discussed the influence of the uncertainty of the iodine filter transmittance on the retrieval of the optical parameters and found that the average relative error was less than 1‰.Finally,we conducted simulation and retrieval based on the atmospheric parameters measured by the *** showed that

关键词： Atmospheric environment Laser detection Satellite Signal simulation Extinction coefficient Backscatter coefficient

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Development of a space cold atom clock

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National Science Review 2020年第12期7卷 1828-1836页

作者： Wei Ren Tang Li Qiuzhi Qu Bin Wang Lin Li Desheng Lü weibiao chen Liang Liu Key Laboratory of Quantum Optics and Center of Cold Atom Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Research Center of Space Laser Information Technology Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency *** such cold atom clocks in space paves the way for further exploration in fundamental physics,for example dark matter and general *** developed a space cold atom clock(SCAC),which was launched into orbit with the Space Lab TG-2 in *** it deorbited with TG-2 in2019,the SCAC had been working continuously for almost 3 *** the period in orbit,many scientific experiments and engineering tests were *** this article,we summarize the principle,development and in-orbit *** works provide the basis for construction of a space-borne time-frequency system in deep space.

关键词： cold atom clock in orbit microgravity fundamental physics

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Laser altimeter of CE-1 payloads system

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Science China(Physics,Mechanics & Astronomy) 2010年第10期53卷 1914-1920页

作者： WANG JianYu SHU Rong chen weibiao JIA JianJun WANG BingYong HUANG GengHua HU YiHua HOU Xia Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China Shanghai Institute of Fine Optical Mechanical Chinese Academy of SciencesShanghai 201800China

The design and operation of the Laser Altimeter of CE-1 Payloads System are presented in this *** paper includes the design of the system and spacecraft-level laser,the description of the emitting-system and receiving system,and the testing of the laser *** CE-1 laser altimeter is the first Chinese deep-space probe using a *** has one beam and operates at 1 Hz,with a nominal accuracy of 5 *** laser altimeter has operated successfully in lunar orbit since November 28,*** has obtained 9120 thousand data values about the lunar altitude.

关键词： CE-1 orbiter laser altimeter system design

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On-chip integrated few-mode erbium–ytterbium co-doped waveguide amplifiers

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Photonics Research 2024年第5期12卷 1067-1077页

作者： XIWEN HE DEYUE MA chen ZHOU MINGYUE XIAO weibiao chen ZHIPING ZHOU Aerospace Laser Technology and Systems Department Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Science and Technology of ChinaHefei 230026China School of Microelectronics Shanghai UniversityShanghai 201800China State Key Laboratory of Advanced Optical Communications Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China

We propose for the first time,to the best of our knowledge,an on-chip integrated few-mode erbium–ytterbium co-doped waveguide amplifier based on an 800 nm thick Si_(3)N_(4)platform,which demonstrates high amplification gains and low differential modal gains(DMGs)*** eccentric waveguide structure and a co-propagating pumping scheme are adopted to balance the gain of each mode.A hybrid mode/polarization/wavelengthdivision(de)multiplexer with low insertion loss and crosstalk is used for multiplexing and demultiplexing in two operation wavebands centered at 1550 nm and 980 nm,where the light in these two bands serves as the signal light and pump light of the amplifier,*** results demonstrate that with an input signal power of 0.1 mW,TE_(0)mode pump power of 300 mW,and TE_(1)mode pump power of 500 m W,the three signal modes(TE_(0)∕TM_(0)∕TE_(1))all exhibit amplification gains exceeding 30 dB,while maintaining a DMG of less than 0.1 dB.

关键词： waveguide pump amplifier

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Design of an on‑chip wavelength conversion device assisted by an erbium‑ytterbium co‑doped waveguide amplifier

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Frontiers of Optoelectronics 2024年第2期17卷 51-60页

作者： chen Zhou Xiwen He Mingyue Xiao Deyue Ma weibiao chen Zhiping Zhou School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Aerospace Laser Technology and System Department Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Aijie Optoelectronic Technology Co.Ltd. Hangzhou 311400China

In current documented studies,it has been observed that wavelength converters utilizing AlGaAsOI waveguides exhibit suboptimal on-chip wavelength conversion efficiency from the C-band to the 2μm band,generally falling below−20.0 *** address this issue,we present a novel wavelength conversion device assisted by a waveguide amplifier,incorporating both AlGaAs wavelength converter and erbium-ytterbium co-doped waveguide amplifier,thereby achieving a notable conversion efficiency exceeding 0 *** noteworthy enhancement in efficiency can be attributed to the specific dispersion design of the AlGaAs wavelength converter,which enables an upsurge in conversion efficiency to−15.54 dB under 100 mW of pump ***,the integration of an erbium-ytterbium co-doped waveguide amplifier facilitates a loss compensation of over 15 *** the use of external optical amplifiers,this device enables efficient and high-bandwidth wavelength conversion,showing promising applications in various fields,such as optical communication,sensing,imaging,and beyond.

关键词： Silicon-based optoelectronics Wavelength conversion Waveguide amplifier 2μm band

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Highly efficient electro-optically Q-switched 473 nm blue laser

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Chinese Optics Letters 2019年第5期17卷 49-52页

作者： Tingting Lu Jian Ma Xiaolei Zhu weibiao chen Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

An external frequency doubling electro-optically Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) 473 nm blue laser was demonstrated. With absorbed pump energy of 48 mJ at 100 Hz repetition rate, about 2 mJ of 473 nm blue laser pulse energy was achieved by cascade frequency doubling. The second harmonic conversion efficiency was 64.5%, and overall optical-optical efficiency was 4.2%, respectively. The blue laser pulse width was less than 10 ns, and beam quality factor was less than 2.4.

关键词： Highly efficient electro-optically Q-switched blue laser cascade frequency doubling

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Comprehensive,Continuous,and Vertical Measurements of Seawater Constituents with Triple-Field-of-View High-Spectral-Resolution Lidar

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Research 2024年第2期2023卷 191-201页

作者： Kai Zhang Yatong chen Hongkai Zhao Zhongping Lee Emmanuel Boss Iwona Stachlewska Davide Dionisi Cedric Jamet Paolo D.Girolamo Aleksey Malinka chengchong Jiang Hongda Wu Lingyun Wu Feitong chen Xiaolei Zhu Nanchao Wang Chuxiao chen Qun Liu Lan Wu Yudi Zhou weibiao chen Dong Liu Ningbo Research Institute State Key Laboratory of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological lnnovation Center Zhejang UniversityHangzhou 311200China Donghai Laboratory.Zhoushan 316021 China State Key Lab of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China School of Marine Sciences University of MaineOronoME 04469-5741USA Faculty of Physics University of WarsawWarsaw 02093Poland institute of Marine Sciences Italian National Research CouncilRome 00133Italy Universitédu Littoral Cote d'Opale CNRSUniv.LilleIRDUMR 8187-LOG-Laboratoire d'Oceanologie et de GéosciencesWimereux F-6293 Francen Institute Scuola di Ingegneria Universita della BasilicataPotenza 85100Italy Institute of Physics National Academy of Sciences of BelarusMinsk 220072Belarus Key Laboratory of Space Laser Communication and Detection Technology Shanghai lnstitute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Inteligent Optics&Photonics Research Center Jiaxing Research Institute Zhejiang UniversityJiaxing 314000China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Jiaxing 314000China

Measuring the characteristics of seawater constituent is in great demand for studies of marine ecosystems and ***,existing techniques based on remote sensing or in situ samplings present various tradeoffs with regard to the diversity,synchronism,temporal-spatial resolution,and depth-resolved capacity of their data ***,we demonstrate a novel oceanic triple-field-of-view(FOV)high-spectral-resolution lidar(HSRL)with an iterative retrieval *** technique provides,for the first time,comprehensive,continuous,and vertical measurements of seawater absorption coefficient,scattering coefficient,and slope of particle size distribution,which are validated by simulations and field ***,it depicts valuable application potentials in the accuracy improvement of seawater classification and the continuous estimation of depth-resolved particulate organic carbon *** triple-FOV HSRL with high performance could greatly increase the knowledge of seawater constituents and promote the understanding of marine ecosystems and biogeochemistry.

关键词： lidar Vertical seawater

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High-beam-quality, 5.4 J, 5 Hz diode-pumped Nd:YAG active mirror laser amplifier

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Chinese Optics Letters 2018年第12期16卷 42-44页

作者： Jing Liu Lei Li Xiangchun Shi Rufeng chen Jianlei Wang weibiao chen Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

A high-beam-quality diode-pumped neodymium-doped yttrium aluminum garnet(Nd:YAG) active mirror laser amplifier was demonstrated. The size of the Nd:YAG crystal was 48 mm × 42 mm × 11 mm with 0.6 at.% Nd doped. When the pump energy was 26.8 J and the input energy was 0.3 J, the output pulse energy reached 5.4 J, and the pulse width of 11.3 ns at a 5 Hz repetition rate was obtained for the two gain modules in three-pass amplification, with corresponding optical-to-optical efficiency of 21.2%. The beam quality was measured as M_x^2=2.48 and M_y^2=2.43 in horizontal and vertical directions, respectively.

关键词： YAG Hz diode-pumped Nd:YAG active mirror laser amplifier High-beam-quality Nd

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1.5 J high-beam-quality Nd:LuAG ceramic active mirror laser amplifier

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Chinese Optics Letters 2020年第2期18卷 48-50页

作者： Jianlei Wang Kaiqi Zhao Tao Feng Xiaolei Zhu weibiao chen Key Laboratory of Space Laser Communication and Detection Technology Chinese Academy of SciencesShanghai 201800China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai 201800China Key Laboratory of Materials for High Power Laser Chinese Academy of SciencesShanghai 201800China

A 1.5 J Nd:LuAG ceramic active mirror laser amplifier with a high beam quality is demonstrated in which a 0.8%(atomic fraction)Nd-doped Nd:LuAG ceramic disk with a diameter of 64 mm and a thickness of 5.5 mm is used as a laser gain medium.A maximum single-pass small-signal gain of 2.59 is measured when the pump energy is 11.5 J,with an injected seed energy of 0.4 J;a maximum output energy of 1.5 J is obtained at the repetition rate of 10 Hz.A far-field beam spot 1.25 times the diffraction limit(DL)is achieved by using a stimulated Brillouin scattering phase conjugation mirror(SBS-PCM)for wavefront correction.

关键词： high energy lasers disk laser amplifiers Nd:LuAG ceramic high beam quality

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大气到海洋激光通信信道仿真

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光学学报 2007年第7期27卷 1166-1172页

作者：梁波朱海陈卫标中国科学院上海光学与精密机械研究所青岛潜艇学院青岛266071

详细分析了蓝绿激光穿过大气海洋信道的信道效应和物理特性,利用理论分析和蒙特卡罗模拟方法完成对光信道仿真。介绍了大气海洋激光通信蒙特卡罗模拟方法及计算步骤。研究了不同厚度云层对光束投影面积的展宽,和光脉冲穿过不同深度海水... 详细信息

详细分析了蓝绿激光穿过大气海洋信道的信道效应和物理特性,利用理论分析和蒙特卡罗模拟方法完成对光信道仿真。介绍了大气海洋激光通信蒙特卡罗模拟方法及计算步骤。研究了不同厚度云层对光束投影面积的展宽,和光脉冲穿过不同深度海水后的空间分布和时域信号波形,讨论了其不同的展宽机理,并对信道的噪声分布进行了分析。发现云层对光脉冲展宽作用在云层厚度500 m时达到饱和,信号能量的随机起伏随海水深度的增加而增大,但能量分布的半峰全宽并不增加,大气海洋的综合信道效应可以用时延滤波器进行建模。

关键词：光通信光束空间分布脉冲展宽蒙特卡罗模拟

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