Acta Photonica Sinica, Volume. 46, Issue 10, 1023001(2017)
Transmit-receive Isolation Analysis and Test of Cassegrain Optical Antenna
Two schemes such as single pixel signal to noise ratio and extinction ratio are used to evaluate transmit-receive isolation ability based on the practical application of the tracking and communication detector in laser communication system. A method to inhibit the back scattering light was presented which boring a hole in the secondary mirror and increasing light trap. It is derived that when aperture ratio of secondary mirror K is 0.1~0.3, it dose not affect the emission efficiency,the measured results show that the improved Cassegrain optical antenna Transmit-Receive isolation is lower than -40 dB while not affecting the emission efficiency of system, and meet the requirements of laser communication system acquiring, tracking and communication.
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XIA Fang-yuan, YANG Jian-feng, YAO Zhou-shi, LI Shuai, WANG Bo, CHEN Xiang. Transmit-receive Isolation Analysis and Test of Cassegrain Optical Antenna[J]. Acta Photonica Sinica, 2017, 46(10): 1023001
Received: Apr. 20, 2017
Accepted: --
Published Online: Nov. 24, 2017
The Author Email: Fang-yuan XIA (xfy8722@qq.com)