Results 1 to 10 of about 35,461 (260)

Blimp-Borne Laser Communication Technology Based on Space Dynamic Base Station

IEEE Photonics Journal, 2021
Space dynamic communication base stations are characterized by high mobility, flexible deployment and wide coverage. It has a wide range of needs in the fields of emergency communication, earthquake relief and island communication.
Tong Wang, Xin Zhao, Chao Lv, Junyao Wang, Yansong Song, Xiaonan Yu, Chang Zhou, Ning An   +7 more
doaj   +3 more sources

A Survey on Laser Space Network: Terminals, Links, and Architectures

IEEE Access, 2022
Due to the high directionality and short wavelength of laser transmission in space, satellite laser communication can achieve high speed, wide bandwidth, high precision, and high security with no electromagnetic spectrum constraints.
Rui Li, Baojun Lin, Yingchun Liu, Mingji Dong, Shuai Zhao   +4 more
doaj   +3 more sources

Modeling and Simulation of Inter-Satellite Laser Communication for Space-Based Gravitational Wave Detection

Sensors
Space-based gravitational wave detection uses an equilateral triangular satellite constellation with inter-satellite laser heterodyne interferometry to measure displacement variations caused by gravitational waves.
Haoqian Liang, Zhaoxiang Yi, Hongling Ling, Kai Luo   +3 more
doaj   +3 more sources

Field Performance of All-Fiber Pulsed Coherent Doppler Lidar [PDF]

EPJ Web of Conferences, 2020
Coherent Doppler lidar (CDL) has been a powerful instrument to measure atmospheric wind velocity. In this work, an 1.5 μm all-fiber pulsed CDL has been developed and deployed to measure wind profiles in campaign experiment in 2018.
Liu Heng, Zhu Xiaopeng, Fan Chunhui, Bi Decang, Liu Jiqiao, Zhang Xin, Zhu Xiaolei, Chen Weibiao   +7 more
doaj   +1 more source

High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology

Sensors, 2021
Phase-sensitive optical time domain reflectometer (Φ-OTDR) has attracted attention in scientific research and industry because of its distributed dynamic linear response to external disturbances.
Yifan Liu, Junqi Yang, Bingyan Wu, Bin Lu, Luwei Shuai, Zhaoyong Wang, Lei Ye, Kang Ying, Qing Ye, Ronghui Qu, Haiwen Cai   +10 more
doaj   +1 more source

Simulation and Design of an Underwater Lidar System Using Non-Coaxial Optics and Multiple Detection Channels

Remote Sensing, 2023
The efficacy of underwater laser detection is considerably impacted by the intense attenuation of light resulting from the scattering and absorption effects of water. In this study, we present the simulation and design of the underwater Lidar system that
Yongqiang Chen, Shouchuan Guo, Yan He, Yuan Luo, Weibiao Chen, Shanjiang Hu, Yifan Huang, Chunhe Hou, Sheng Su   +8 more
doaj   +1 more source

Monte Carlo Simulation with Experimental Research about Underwater Transmission and Imaging of Laser

Applied Sciences, 2022
Attenuation of the laser beam in underwater transmission and detection due to absorption and scattering results in a rapid reduction in energy and blurring of the image.
Shouchuan Guo, Yan He, Yongqiang Chen, Weibiao Chen, Qi Chen, Yifan Huang   +5 more
doaj   +1 more source

Simulation and Design of Circular Scanning Airborne Geiger Mode Lidar for High-Resolution Topographic Mapping

Sensors, 2022
Over the last two decades, Geiger-mode lidar (GML) systems have been developing rapidly in defense and commercial applications, demonstrating high point density and great collection efficiency. We presented a circular scanning GML system simulation model
Fanghua Liu, Yan He, Weibiao Chen, Yuan Luo, Jiayong Yu, Yongqiang Chen, Chongmiao Jiao, Meizhong Liu   +7 more
doaj   +1 more source

High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method

IEEE Photonics Journal, 2020
Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration.
Jinfeng Gu, Bin Lu, Junqi Yang, Zhaoyong Wang, Lei Ye, Qing Ye, Ronghui Qu, Haiwen Cai   +7 more
doaj   +1 more source

A Low Temperature Coefficient Time-to-Digital Converter with 1.3 ps Resolution Implemented in a 28 nm FPGA

Sensors, 2022
Time-to-digital converter (TDC) is the key technology to realize accurate time delay measurement in high-precision optical fiber time-frequency transmission and synchronization, optical sensing and many scientific applications.
Xiangyu Mao, Fei Yang, Fang Wei, Jiawen Shi, Jian Cai, Haiwen Cai   +5 more
doaj   +1 more source