Abstract
In this Letter, we propose a cost-efficient bi-directional (BiDi) polarization-multiplexed self-homodyne coherent detection (SHCD) system, in which only one fiber link and one adaptive polarization controller (APC) are required. By employing the correlation of the state of polarization (SOP) between the upstream and downstream light, one APC is capable of stabilizing SOPs of the counterpropagating waves at the same time. The signal and local oscillator (LO) can be optically split by a polarization beam splitter (PBS), relaxing pressure of the digital signal processing (DSP) and simplifying the coherent receiver. The impact induced by polarization cross talk and delay mismatch is collectively investigated by theoretical analysis and simulation. Finally, the proposed scheme is experimentally verified through 120 Gbit/s 16-quadrature amplitude modulation (16-QAM) transmission, achieving a satisfying laser-linewidth tolerance of 10 MHz and a polarization rotation tolerance of up to 45 rad/s.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Yifan Zeng, Xuefeng Wang, Weihao Li, Li Wang, and Ming Tang
Opt. Lett. 47(18) 4684-4687 (2022)
Yizhao Chen, Junda Chen, Weihao Li, Jiajun Zhou, Mingming Zhang, Deming Liu, and Ming Tang
Opt. Lett. 47(6) 1423-1426 (2022)
Hanzi Huang, Yetian Huang, Yu He, Haoshuo Chen, Yong Zhang, Qianwu Zhang, Nicolas K. Fontaine, Roland Ryf, Yingxiong Song, and Yikai Su
Opt. Lett. 46(10) 2292-2295 (2021)