Title:
光送信装置
Document Type and Number:
Japanese Patent JP4505403
Kind Code:
B2
Abstract:
In an optical transmitter comprising a directly modulated laser (2) and a wavelength filter (3) provided on a post-stage of the directly modulated laser (2), the wavelength filter (3) has a modulated light input port (3A) for inputting modulated light output from the directly modulated laser (2), a filter transmitted light output port (3B) for outputting light having a wavelength included in a filter transmission band among the modulated light as filter transmitted light, and a filter cutoff light output port (3C) provided separately from the modulated light input port (3A) and the filter transmitted light output port (3B) and outputting light having a wavelength included in a filter cutoff band among the modulated light as filter cutoff light, and the peak of the filter transmission band is set on a shorter-wave side from the peak of the spectrum of modulated light output from the directly modulated laser.
Inventors:
Jie Akiyama
Takeyuki Yamamoto
Takeyuki Yamamoto
Application Number:
JP2005330372A
Publication Date:
July 21, 2010
Filing Date:
November 15, 2005
Export Citation:
Assignee:
富士通株式会社
International Classes:
G02B6/122; G02B6/12; H01S5/50
Domestic Patent References:
| JP2198235A | ||||
| JP2004157192A | ||||
| JP2003513328A | ||||
| JP2002169131A | ||||
| JP62100706A | ||||
| JP2003298525A | ||||
| JP2002258083A | ||||
| JP8502606A | ||||
| JP2004191954A | ||||
| JP8201648A | ||||
| JP2003513327A | ||||
| JP2004191944A |
Attorney, Agent or Firm:
Yu Sanada