公开(公告)号：EP3130958A4

公开(公告)日：2017-11-01

申请号：EP15776434

申请日：2015-04-10

申请人： NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

发明人： YONEYAMA MIKIO ,  KAWAKAMI HIROTO ,  ONO TAKASHI ,  MATSUURA AKIHIKO ,  KATAOKA TOMOYOSHI ,  TANAKA KATSUYA ,  TACHIBANA MASAHIRO ,  OYAMA YUYA

IPC分类号： G02F1/01 ,  H04B10/54

CPC分类号： H04B10/07955 ,  G02F2001/212 ,  G02F2201/58 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/5161 ,  H04B10/541 ,  H04L27/364

摘要： A light modulation device detects a power of the modulated optical signal modulated by each of an I-component optical modulator and a Q-component optical modulator, synchronously-detects a component of a frequency fd from the power of the modulated optical signal, outputs a dither signal of a frequency fd/n (where n is a positive integer equal to or larger than 1) applied to a first bias voltage or a second bias voltage when adjusting the first bias voltage or the second bias voltage, outputs two dither signals having a frequency fd/m (where m is a positive integer equal to or larger than 1, where n

公开(公告)号：EP2651056A4

公开(公告)日：2014-03-19

申请号：EP11846946

申请日：2011-12-09

申请人： NIPPON TELEGRAPH & TELEPHONE

发明人： SUZUKI MASAHIRO ,  OHARA TAKUYA ,  ONO TAKASHI ,  AISAWA SHIGEKI ,  TOMIZAWA MASAHITO

IPC分类号： H04J3/07 ,  H04J3/16

CPC分类号： H04J3/0658 ,  H04J3/07 ,  H04J3/1652 ,  H04J14/0227 ,  H04Q11/0005 ,  H04Q2011/0045