Zihang Wang Yihao Zhang Lilin Yi Weisheng Hu Qunbi Zhuge Improved QoT Estimation through Input Parameter Refinement in Bidirectional Raman Amplified Links. OFC 2026 1-3 conf/ofc/2026 https://ieeexplore.ieee.org/document/11525298 db/conf/ofc/ofc2026.html#WangZYHZ26 streams/conf/ofc