Title:
光送信装置、光受信装置、およびそれらを含む光通信システム
Document Type and Number:
Japanese Patent JP5644893
Kind Code:
B2
Abstract:
A phase shift unit provides a prescribed phase difference (pi/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit. A low-frequency signal f0 is superimposed on one of the optical signals. A signal of which phase is shifted by pi/2 from the low-frequency signal f0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode. 2f0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit is controlled by feedback control so that the 2f0 component becomes the minimum.
Inventors:
秋山 祐一
星田 剛司
三浦 章
甲斐 雄高
大井 寛己
イエンス・ラスムッセン
中村 健太郎
桑田 直樹
西澤 義徳
▲高▼原 智夫
幸 雅洋
星田 剛司
三浦 章
甲斐 雄高
大井 寛己
イエンス・ラスムッセン
中村 健太郎
桑田 直樹
西澤 義徳
▲高▼原 智夫
幸 雅洋
Application Number:
JP2013105806A
Publication Date:
December 24, 2014
Filing Date:
May 20, 2013
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B10/40; H04B10/69; G02F1/01; H04B10/07; H04B10/50; H04B10/516; H04B10/60; H04B10/61
Attorney, Agent or Firm:
Yoshiyuki Osuge
Tamio Tokunaga
Tamio Tokunaga