Laser power controller and method for performing auto power...

Details Laser power controller and method for performing auto power... Laser power controller and method for performing auto power...

2007-08-28

2007-08-28

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S029021

Reexamination Certificate

active

10710970

ABSTRACT:
A laser power controller for performing an auto power control to control the laser power of an optical pick-up unit (OPU) includes: a sample/hold circuit used for sampling and holding a front photodiode output signal to generate an analog feedback signal; an analog-to-digital converter (ADC) electrically coupled to the sample/hold circuit for transferring the analog feedback signal into a digital feedback signal; and a digital control circuit electrically coupled to the ADC for generating a power control signal and outputting the power control signal to the OPU in order to control the laser power of the OPU. The front photodiode output signal corresponds to the laser power of the OPU.

REFERENCES:
patent: 2006/0165139 (2006-07-01), Sanchez

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