中心博士后秦军、舒浩文、Rahul Kumar Gangwar与博士生陶源盛等最新关于Si调制器线性度补偿的文章 “Highly Reliable Transmission System for Next-generation Optical Access Network Based on Silicon Modulator with Maximum-ratio Combined Receiver” 近期发表在IEEE Journal of Selected Topics in Quantum Electronics（JSTQE）期刊上，文章提出了一种新的基于最大SNR比例的混合接收机（MRC-RX），通过证实验对其性能进行了验证，用以缓解在无源光网络（PON）中采用Si调制器由于低线性度所带来的系统性能下降。结果表明通过采用所提出的MRC-RX，可以获得优化的接收机灵敏度，在减轻由调制器带来的系统性能下降的同时，可以在无论高或者低接收功率的情况下都能获得可靠的传输。在误码率为1.0×10-4时，与lite相干接收机（lite CO-RX）和直接检测接收机（DD-RX）相比，所提出的MRC-RX的接收机灵敏度分别提高了3.5dB和6.7dB。与使用商业铌酸锂（LiNbO3）调制器的系统相比，采用Si调制器的系统中MRC-RX的接收灵敏度提高了5.6db。结果表明采用MRC-RX可以有效地降低由于Si调制器的低线性度导致的系统性能下降。文章所提出的方法对利用硅调制器构建下一代高可靠光电子集成接入网具有一定的指导意义。

摘要：A novel maximum-ratio combined receiver (MRC-RX) is proposed and demonstrated through a proof-of-concept experiment, conducted to mitigate the system performance degradation caused by the low linearity of the silicon modulator when deployed in passive optical network (PON)-based access. By employing the proposed MRC-RX, an optimized receiver sensitivity is achieved, which enables the mitigation of the performance degradation induced by the silicon modulator, and a more reliable transmission in both cases of low and high received power. In the proof-of-concept experiment, at a bit error rate of 1.0×10^-4, the receiver sensitivity of the MRC-RX was improved by 3.5 dB and 6.7 dB compared with the lite coherent receiver (lite CO-RX) and direct detection receiver (DD-RX), respectively. Compared with a system employing a commercial lithium niobate (LiNbO3) modulator, a maximum improvement of ~5.6 dB in the receiver sensitivity was obtained for the MRC-RX in the silicon modulator system. Thus, the system performance degradation caused by the low linearity of the silicon modulator can be effectively reduced by employing the MRC-RX. The proposed method makes sense to the building of next generation high reliable photonics integrated access by employing silicon modulators.

论文链接：

https://ieeexplore.ieee.org/document/9186798