Optical output control circuit and optical output monitoring method for monitoring optical output from laser light source
OwnerMunetoshi Yoshizawainventor
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Abstract
A Light receiver generates a monitoring voltage according to an optical output of an LD element. The control circuit obtains a set value according to the ambient temperature around the LD element, and controls the optical output of the LD element on the basis of the comparing the result between the set value and the monitoring voltage. An adjustment section corrects the monitoring voltage on the basis of the set value and outputs the corrected monitoring voltage.
Claims11
An optical output control circuit which monitors an optical output of a laser light source, the optical output control circuit comprising:
- a light receiver that generates a monitoring voltage according to the optical output;
- a controller that obtains a set value according to the ambient temperature around the laser light source and controls the optical output of the laser light source on the basis of comparing the result between the set value and the monitoring voltage;
- and
- an adjustor that corrects the monitoring voltage on the basis of the set value and outputs a corrected monitoring voltage.
An optical output monitoring method comprising:
- generating a monitoring voltage according to an optical output of a laser light source;
- generating a set value according to the ambient temperature around the laser light source;
- controlling the optical output of the laser light source on the basis of comparing the result comparison between the set value and the monitoring voltage;
- and
- correcting the monitoring voltage on the basis of the set value and outputting the corrected monitoring voltage.
Dependencies are inferred from the claim text.