Enhanced Reservoir Computing With Simplified Feedback for IMDD Transmission Equalization
Yixian Dong, Qingming Zhang, Yiqian Shi, Wentao Lv, Xihua Zou, Wei Pan, Lianshan Yan · IEEE Photonics Technology Letters · 2025
By eliminating redundant feedback mechanisms, we propose and experimentally validate an enhanced reservoir computing (RC)-based equalizer with simplified feedback for intensity modulation direct detection (IMDD) short-reach optical transmission systems. Experimental results demonstrate that the simplified model, which retains only the reservoir feedback loop and reduces the number of trainable parameters, achieves bit error rate (BER) performance comparable to the dual-feedback model. Without compromising equalization effectiveness, the proposed architecture reduces computational complexity and enhance scalability for practical deployment in high-speed optical networks.