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Seiji OKAMOTO Kazushige YONENAGA Kengo HORIKOSHI Mitsuteru YOSHIDA Yutaka MIYAMOTO Masahito TOMIZAWA Takeshi OKAMOTO Hidemi NOGUCHI Jun-ichi ABE Junichiro MATSUI Hisao NAKASHIMA Yuichi AKIYAMA Takeshi HOSHIDA Hiroshi ONAKA Kenya SUGIHARA Soichiro KAMETANI Kazuo KUBO Takashi SUGIHARA
We describe a field experiment of flexible modulation format adaptation on a real-time 400Gbit/s/ch DSP-LSI. This real-time DSP-LSI features OSNR estimation, practical simplified back propagation, and high gain soft-decision forward error correction. With these techniques, we have successfully demonstrated modulation format allocation and transmission of 56-channel 400Gbit/s-2SC-PDM-16QAM and 200Gbit/s-2SC-PDM-QPSK signals in 216km and 3246km standard single mode fiber, respectively.
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