Title:
SYSTEMS AND METHODS FOR AUTOMATIC POWER CONTROL OF LASER DIODES
Document Type and Number:
WIPO Patent Application WO2004061386
Kind Code:
B1
Abstract:
Methods and system are provided for automatic power control of a laser diode, e.g., in a laser driver. In accordance with an embodiment of the present invention, a power controller includes a detector circuit (107) adapted to detect the output (104a) of the laser diode and to produce a measured output therefrom. A comparator (130) compares a desired output to the measured output, and produces an error signal therefrom. The error signal is provided to an integrator circuit (131) that produces an integrated error signal. At least one digital-to-analog converter (DAC) (142) uses the integrated error signal to produce a current drive signal that drives the laser diode (102).
Inventors:
FAIRGRIEVE ALEXANDER (US)
SMITH D STUART (US)
TANG BILL R (US)
REES THEODORE D (US)
SMITH D STUART (US)
TANG BILL R (US)
REES THEODORE D (US)
Application Number:
PCT/US2003/038097
Publication Date:
December 16, 2004
Filing Date:
November 26, 2003
Export Citation:
Assignee:
ELANTEC SEMICONDUCTOR INC (US)
FAIRGRIEVE ALEXANDER (US)
SMITH D STUART (US)
TANG BILL R (US)
REES THEODORE D (US)
FAIRGRIEVE ALEXANDER (US)
SMITH D STUART (US)
TANG BILL R (US)
REES THEODORE D (US)
International Classes:
G11B7/125; H01S5/042; H01S5/0683; (IPC1-7): H01S5/042; H01S5/0683
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