Title:
OPTICAL TRANSMITTER
Document Type and Number:
Japanese Patent JPH05134220
Kind Code:
A
Abstract:
PURPOSE:To provide the optical transmitter which can perform high-speed modulator and compensate the operation point drift of an optical modulator without branching a light output and is suitably reduced in size as to the improvement of an optical transmitter equipped with a Mach-Zehnder type optical modulator. CONSTITUTION:This optical transmitter consists of the Mach-Zehnder type optical modulator 6 equipped with a substrate 14 having electrooptic effect, an optical waveguide 16 having a couple of branch waveguides 18 and 20 between a light incidence terminal and a light projection terminal 10 formed on a substrate 14, and electrodes 22 and 24 mounted on the branch waveguides 18 and 20, a light source 2 which is connected to the light incidence terminal 8, a photodetector 34 which is fixed on the substrate 14 and receives leak light emitted from the confluence point between the branch waveguides 18 and 20, a driving circuit 26, and an operation point control circuit 36.
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Inventors:
TAKAMATSU HISASHI
WATANABE JUNKO
HAKOGI HIRONAO
FURUKAWA HIROTOSHI
WATANABE JUNKO
HAKOGI HIRONAO
FURUKAWA HIROTOSHI
Application Number:
JP29342991A
Publication Date:
May 28, 1993
Filing Date:
November 08, 1991
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G02B6/12; G02F1/01; G02F1/03; G02F1/035; G02F1/225; (IPC1-7): G02B6/12; G02F1/03; G02F1/035
Attorney, Agent or Firm:
Matsumoto