Title:
光送信機
Document Type and Number:
Japanese Patent JP5405716
Kind Code:
B2
Abstract:
A signal Data1 and Data2 are output from a DQPSK signal source. The output signal is input to the modulator drivers (1 and 2) of the differential output. A drive signal is applied from the drivers (1 and 2) to a modulator, and modulated light is output. An optical coupler (20) branches modulator output, and a power monitor (21) detects the power of the branched light. A detection result is transmitted to an amplitude control unit (22). The amplitude control unit (22) adjusts the amplitude of the drivers (1 and 2) such that the detection result of the power monitor (21) can be the maximum.
Inventors:
Toshiki Tanaka
Takeshi Hoshida
Hisao Nakajima
Yuichi Akiyama
Takeshi Hoshida
Hisao Nakajima
Yuichi Akiyama
Application Number:
JP2006269362A
Publication Date:
February 05, 2014
Filing Date:
September 29, 2006
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B10/2507; H04B10/516; H04B10/07; H04B10/2513; H04B10/548; H04B10/556; H04B10/58; H04B10/61; H04L27/20
Domestic Patent References:
| JP2003295138A | ||||
| JP2005005767A | ||||
| JP2005091663A | ||||
| JP2006020324A | ||||
| JP2002023120A | ||||
| JP11305175A | ||||
| JP10048582A | ||||
| JP2004516743A | ||||
| JP2003283432A |
Attorney, Agent or Firm:
Yoshiyuki Osuga
virtue Tamio Ei
Hiroaki Kanda
virtue Tamio Ei
Hiroaki Kanda