[S-C-7] Twin-PIN Photodiode with High-Speed Response at High Optical Input Power for Coherent Receiver Hisashi HAMAGUCHI、Masao MAKIUCHI、Osamu WADA、Shigenobu YAMAKOSHI (1.FUJITSU LABORATORIES LTD.) https://doi.org/10.7567/SSDM.1989.S-C-7