Method and related apparatus for feedback control of laser...

Details Method and related apparatus for feedback control of laser... Method and related apparatus for feedback control of laser...

2007-06-19

2007-06-19

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular component circuitry

Controlling current or voltage to laser

C372S029021, C372S038020

Reexamination Certificate

active

10707320

ABSTRACT:
A method and related apparatus for feedback control of laser power provided by a pick-up head of an optical disk drive. The pick-up head can adjust a cross-voltage of a laser generator according to a signal level of a control signal such that the laser power is changed correspondingly. The method includes updating the signal level of the control signal according to feedback of the cross-voltage or the control signal, such that the laser power is adjusted accordingly.

REFERENCES:
patent: 4967417 (1990-10-01), Yamada
patent: 2004/0202216 (2004-10-01), Fairgrieve

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