Title:
LASER DIODE DRIVE DEVICE AND OPTICAL TRANSMITTER
Document Type and Number:
WIPO Patent Application WO/2020/008566
Kind Code:
A1
Abstract:
A laser diode drive device (20), comprising: a temperature sensor (3) for detecting the temperature of a laser diode (1); an optical output control unit (8) for generating a bias current fed to the laser diode so that the intensity of an optical signal outputted by the laser diode assumes a first value defined in advance; a current adjustment value computation unit (5) for generating, on the basis of the detected temperature, a modulation current to be fed to the laser diode, so that the extinction ratio of the optical signal when no tracking error is present assumes a second value defined in advance; a tracking error compensation unit (4) for calculating a correction amount used in correction of the bias current, which is performed in order to compensate for tracking error, on the basis of the detected temperature and output characteristic data indicating the correlation between the intensity of the optical signal and the value of a drive current, which is a current fed to the laser diode, and for correcting the modulation current to compensate for the tracking error; and a bias current control unit (6) for correcting the bias current.
Inventors:
HORAYAMA NANAKO (JP)
YOSHIMA SATOSHI (JP)
EGUSA KEISUKE (JP)
YOSHIMA SATOSHI (JP)
EGUSA KEISUKE (JP)
Application Number:
PCT/JP2018/025371
Publication Date:
January 09, 2020
Filing Date:
July 04, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H01S5/0683
Foreign References:
| JP2013008843A | 2013-01-10 | |||
| JP2007103398A | 2007-04-19 | |||
| JP2009070879A | 2009-04-02 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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