Results 21 to 30 of about 35,461 (260)

Solar Pumped Lasers for Free Space Laser Communication

Proceedings of the 7th International Conference on Photonics, Optics and Laser Technology, 2019
Solar Pumped Lasers (SPL) is a kind of lasers that can transform solar light into laser directly, with the advantages of least energy transform procedure, higher energy transform efficiency, higher reliability, and longer lifetime, which is suitable for use in unattended space system, for solar light is the only form of energy source in space. In order
Changming Zhao, Haiyang Zhang, Zhe Guan, Zitao Cai, Dongbing He, Yongheng Wang   +5 more
openaire   +1 more source

Fast Underwater Optical Beacon Finding and High Accuracy Visual Ranging Method Based on Deep Learning

Sensors, 2022
Visual recognition and localization of underwater optical beacons is an important step in autonomous underwater vehicle (AUV) docking. The main issues that restrict the use of underwater monocular vision range are the attenuation of light in water, the ...
Bo Zhang, Ping Zhong, Fu Yang, Tianhua Zhou, Lingfei Shen   +4 more
doaj   +1 more source

Airborne Validation Experiment of 1.57-μm Double-Pulse IPDA LIDAR for Atmospheric Carbon Dioxide Measurement

Remote Sensing, 2020
The demand for greenhouse gas measurement has increased dramatically due to global warming. A 1.57-μm airborne double-pulse integrated-path differential absorption (IPDA) light detection and ranging (LIDAR) system for CO2 concentration measurement was ...
Yadan Zhu, Juxin Yang, Xiao Chen, Xiaopeng Zhu, Junxuan Zhang, Shiguang Li, Yanguang Sun, Xia Hou, Decang Bi, Lingbing Bu, Yang Zhang, Jiqiao Liu, Weibiao Chen   +12 more
doaj   +1 more source

Wide-band laser communications in space [PDF]

IEEE Journal of Quantum Electronics, 1971
Candidate wide-bandwidth (1-Gbit/s) satellite laser communications systems are compared on two different bases. First, a comparison is made with projected component technology to establish relative performance between the various approaches based on the fundamental system parameters. From this comparison it appears that the CO 2 (10.6-μm) system offers
Forster, Donald C., Goodwin, Frank E., Bridges, William B.   +2 more
openaire   +2 more sources

Phase-Shift Laser Ranging Technology Based on Multi-Frequency Carrier Phase Modulation

Photonics, 2022
Compared to traditional phase laser ranging technology, phase-shift laser ranging technology based on carrier phase modulation has significant advantages, such as simple modulation and demodulation, as well as simultaneous ranging and velocity ...
Lisha Zhou, Hongyu He, Jianfeng Sun, Baojun Lin   +3 more
doaj   +1 more source

Design of a Phase Sensor Applied in the Optical Phase-Locked Loop Based on a High-Speed Coherent Laser Communication System

IEEE Access, 2018
The background of our research is, designing a precise phase detection sensor for high-speed coherent homodyne systems, and combining it with optical phase-locked loops (OPLLs) to achieve coherent demodulation and carrier recovery.
Yang Liu, Shoufeng Tong, Shuai Chang, Yansong Song, Yan Dong, Xin Zhao, Zhe An, Fuwan Yu   +7 more
doaj   +1 more source

A Balanced Dual-Intracavity Dual-Mode Interlocking Method for Fiber Laser Self-Reference Wavelength Stabilization

IEEE Photonics Journal
The laser frequency stabilization technology is very important in the development of laser applications, and the improvement of this technology has tend to further expectations for portability and low cost, in addition to the realization of strict ...
Liuxin Zhang, Kang Ying, Guochao Wang, Haoyang Pi, Zhaoyong Wang, Yanguang Sun, Fang Wei, Youzhen Gui, Qing Ye, Haiwen Cai   +9 more
doaj   +1 more source

Investigation of Doppler Frequency Shift Effect on the Performance of Four-Channel Space Chaotic Laser Communication

IEEE Photonics Journal, 2023
In this article, the wavelength division multiplexing (WDM) technology is applied to the space chaotic laser communication system. We deduce the bit error rate (BER) model of multi-channel space chaotic laser communication with Doppler frequency shift ...
Mi Li, Xue Wang, Yisi Wang, You Guo, Jisun Chen, Yijun Jiang   +5 more
doaj   +1 more source

Automated FRAP microscopy for high‐throughput analysis of protein dynamics in chromatin organization and transcription

FEBS Open Bio, EarlyView.
RoboMic is an automated confocal microscopy pipeline for high‐throughput functional imaging in living cells. Demonstrated with fluorescence recovery after photobleaching (FRAP), it integrates AI‐driven nuclear segmentation, ROI selection, bleaching, and analysis.
Selçuk Yavuz, Bart Geverts, Johan A. Slotman, Andrea Sacchetti, Stefan Prekovic, Martin E. van Royen, Adriaan B. Houtsmuller   +6 more
wiley   +1 more source

Free space laser communications [PDF]

Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013), 1999
Summary form only given. Increased data transfer demands, limited RF spectral allocations, and emphasis on smaller spacecraft platforms to keep launch costs down are forcing space mission planners to consider free-space optical communications for their space-ground and intersatellite communications links.
openaire   +1 more source