The performance analysis of coherent detection based on the optical Costas loop

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• 作者：Shuai Chang^a ; Yansong Song^b ; ^{songyansong@cust.edu.cn} ; Yang Liu^a ; Shicong Hao^a ; Shoufeng Tong^a ; Huilin Jiang^a ; Yan Dong^b ; Hang Nan^b
• 关键词：Coherent detection ; Costas loop ; Phase error variance ; Bit error rate
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：1333-1338
• 全文大小：680 K
• 卷排序：130

文摘

The homodyne coherent detection with Costas loop has been analyzed by considering the shot noise and phase noise. The phase error variance and bit error rate of the coherent detection system have been derived and analyzed in theory. The influences of linewidth of laser, the incoming signal laser power, phase error and the photodiode responsivity for the detectors on the bit error rate have been investigated in detail. The results obtained in this analysis have the potential application for the free space laser communication used the coherent detection.