Laser power monitor circuit used in a magneto-optical disk devic

Details Laser power monitor circuit used in a magneto-optical disk devic Laser power monitor circuit used in a magneto-optical disk devic

1994-11-08

1995-08-01

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

H01S 300

Patent

active

054385822

ABSTRACT:
A laser power monitor circuit for monitoring the power of a laser used in a magneto-optical disk device and other related devices. In order to provide marks in the recording medium, a write power of the laser is required, and in between the marks, the laser is to have a pedestal power. During recording on the magneto-optical disk, recording corrections are performed at the start of the pedestal power and write power of the laser to provide marks in the recording medium which are properly shaped. The laser power monitor circuit accurately monitors the power of the laser light on a recording medium and includes a reverse correction circuit to provide reverse correction of the recording corrected values among the monitored values of laser power to bring the laser to the appropriate write power or pedestal power.

REFERENCES:
patent: 4745610 (1988-05-01), Yoshikawa
patent: 4855988 (1995-08-01), Shinbayashi et al.
patent: 4924473 (1990-05-01), Burgyan et al.
patent: 5018154 (1991-05-01), Ohashi
patent: 5341359 (1994-08-01), Birukawa et al.
patent: 5345434 (1994-09-01), Ide et al.

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