Bidirectional and crossed AWGR-based interconnection for large-scale data centers. - Yang Lu; Alami Badreddine; Minghao Yan; Jiaqing Liu; Zihui Lin; Jiawei Lv; Yunxin Lv; Meihua Bi; Miao Hu (J. Opt. Commun. Netw., 2026)