World's First Field-Trial Demonstration of Bidirectional 200G TFDM Coherent PON Enabled by Real-Time FPGA-Based Reception. - An Yan; Renie Zheng; Hao Xu; Penghao Luo; Zeyu Zhao; Minhu Shen; Shuhong He; Sizhe Xing; Yongzhu Hu; Xuyu Deng; Junhao Zhao; Boyu Dong; et al. (OFC, 2026)