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10 May 2019 Influence of electro-optical crystal flatness on indirect modulation signal for underwater blue-green laser communication
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Proceedings Volume 11068, Second Symposium on Novel Technology of X-Ray Imaging; 1106823 (2019) https://doi.org/10.1117/12.2524680
Event: Second Symposium on Novel Technology of X-Ray Imaging, 2018, Hefei, China
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.
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Biao Han, Wei Wang, Yunqiang Zheng, Kui Shi, Jiacheng Meng, Yulong Su, Tao Wang, Yi Han, Xiaoping Xie, and Wei Zhao "Influence of electro-optical crystal flatness on indirect modulation signal for underwater blue-green laser communication", Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 1106823 (10 May 2019); https://doi.org/10.1117/12.2524680
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