激光与光电子学进展, 2011, 48 (8): 080601, 网络出版: 2011-07-10
40/100 Gb/s偏振复用相干检测光模块的技术分析 
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Technical Analysis of 40/100 Gb/s Polarization Multiplexing and Coherent Detection for Optical Transponder Module
相干光通信 偏振复用 相干检测 偏振复用四相相移键控 coherent optical communication polarization multiplexing coherent detection polarization modulation-quadrature phase shift key
摘要
利用偏振复用四相相移键控(PM-QPSK)调制技术和相干检测技术，实现40/100 Gb/s光模块的长距离传输。基于相干检测的偏振复用四相相移键控调制格式是40/100 Gb/s长距离传输的主要研究方向，与直接检测系统相比，相干检测具有更高的频谱效率。现有的相干检测是基于高速模数转换器（ADC）的快速发展，ADC对混频后的基带信号采样，通过数字信号处理（DSP）芯片数字均衡的方式完成相干接收。数字信号处理芯片数字均衡的方式可以实现定时恢复、信号恢复、偏振和偏振模色散(PMD)跟踪，以及色散补偿。
Abstract
Polarization modulation-quadrature phase shift keying (PM-QPSK) modulation technology and coherent detection technology are used to realize the long distance transmission for 40/100 Gb/s optical module. Coherent detection in conjunction with advanced PM-QPSK modulation formats is a main research field 40/100 Gb/s-long haul transmission since such scheme can achieve higher spectrum efficiency than conventional direct-detection systems. The re-emergence of coherent detection is attributed to the advanced development of high-speed analog-to-digital converters (ADC). High-speed ADC samples mixing frequency of baseband signal, and realizes coherent reception by digital signal processing (DSP) chip working in a digital balanced way. Digital signal processing chip can realize timing recovery, signal recovery, polarization and polarization mode dispersion (PMD) tracking, and the dispersion compensation.
胡毅, 杨家龙. 40/100 Gb/s偏振复用相干检测光模块的技术分析[J]. 激光与光电子学进展, 2011, 48(8): 080601. Hu Yi, Yang Jialong. Technical Analysis of 40/100 Gb/s Polarization Multiplexing and Coherent Detection for Optical Transponder Module[J]. Laser & Optoelectronics Progress, 2011, 48(8): 080601.
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