%0 Journal Article %T Highly integrated optical modules for ≥400-G coherent optical links %A Nagashima, Kazuya %A Nishita, Masayoshi %J Proceedings of SPIE %V 12028 %P 1202807-1202807-11 %@ 0277-786X %D 2022-03-04 %I SPIE %~ DeepDyve