Abstract
The Integrated Laser Communication/Ranging System, which uses a coded signal as the ranging information carrier, is of great importance to the next large-capacity inter-satellite information network. In this paper, a system design with a high-sensitivity feedback-homodyne detection scheme and an asynchronous ranging algorithm is demonstrated with real-time field-programmable gate array-implementation (FPGA). The parallel fast Fourier transformation (FFT) estimation is applied to improve the speed and the range of the wavelength drift tracking, which can handle a dynamic wavelength drift up to 2.4 pm/s (300 MHz/s). Meanwhile, for clock sources with subtle dynamic frequency offset and sufficient stability, the proposed fractional symbol ranging method is proven to achieve millimeter-level measurement accuracy. The designed system is shown to perform well in terms of both laser linewidth tolerance and noise resistance.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Funan Zhu, Shaowen Lu, Jianfeng Sun, Ren Zhu, Xia Hou, and Weibiao Chen
Appl. Opt. 60(28) 8930-8938 (2021)
Shaowen Lu, Min Gao, Yan Yang, Ren Zhu, Xia Hou, Jianfeng Sun, Weibiao Chen, and Xiaolei Zhu
Appl. Opt. 58(27) 7517-7522 (2019)
Chaolei Yue, Jiawei Li, Jianfeng Sun, Ren Zhu, Xia Hou, Xiaoxi Zhang, Lei Liu, and Weibiao Chen
Appl. Opt. 57(27) 7915-7923 (2018)