Four-Channel Integrated Receiver with a Built-In Spatial Demultiplexer Optics for 100 Gb/s Ethernet. - Keita Mochizuki; Hiroshi Aruga; Hiromitsu Itamoto; Keitaro Yamagishi; Yuichiro Horiguchi; Satoshi Nishikawa; Ryota Takemura; Masaharu Nakaji; Atsushi Sugitatsu (IEICE Trans. Electron., 2013)