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9 June 2006 Optical design of an optical system for free space optical communication
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Proceedings Volume 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 614915 (2006) https://doi.org/10.1117/12.674229
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China
Abstract
An optical system for free space optical communication is designed, which are composed of three parts: Optical sender are designed as Schmidt-Cassegrain antenna to collimate the laser beam. λ/2 plate and polarization beam splitter are used to decrease the interference of astigmatism and reflection. The dense-lines Fresnel lens as an optical receiver, and further an automatic tracking system is employed to eliminate the pointing error between communication terminals. Experiment shows that the laser divergence of 2 mrad is obtained for the communication system at the wavelength of 850nm, with pointing error less than 5 μ rad, and laser power of 10dB. The detector can receive -17.5dB even in middle fog condition 2 km ranged. The system can be used for free space optical communication in 2km distance except under especial atrocious weather.
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Chang-yu Shen, Fei Chen, and Xiang-dong Yu "Optical design of an optical system for free space optical communication", Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 614915 (9 June 2006); https://doi.org/10.1117/12.674229
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