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Influence of electro-optical crystal flatness on indirect modulation signal for underwater blue-green laser communication
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Paper Abstract

Indirect modulation with electro-optical crystal is a useful way to generate optical signal for underwater blue-green laser communication. However, as crystal surface is not strictly flat in practical application, light intensity distribution in the cross section is non-uniform, which would affect extinction ratio of modulated signal and system performance. In this letter, we study this issue with Monte Carlo method. The result shows that with the increase of crystal flatness, extinction ratio is decreasing dramatically, and it should be smaller than 0.78μm in order to make the extinction ratio greater than 10dB while 0.25μm for 20dB, 0.08μm for 30dB, and 0.025μm for 40dB.

Paper Details

Date Published: 10 May 2019
PDF: 6 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 1106823 (10 May 2019); doi: 10.1117/12.2524680
Show Author Affiliations
Biao Han, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Wei Wang, Xi'an Institute of Optics and Precision Mechanics (China)
Yunqiang Zheng, Xi'an Institute of Optics and Precision Mechanics (China)
Kui Shi, Xi'an Institute of Optics and Precision Mechanics (China)
Jiacheng Meng, Xi'an Institute of Optics and Precision Mechanics (China)
Yulong Su, Xi'an Institute of Optics and Precision Mechanics (China)
Tao Wang, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences
Yi Han, Xi'an Institute of Optics and Precision Mechanics (China)
Xiaoping Xie, Xi'an Institute of Optics and Precision Mechanics (China)
Wei Zhao, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

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