Automatic power control of a semiconductor laser array

Details Automatic power control of a semiconductor laser array Automatic power control of a semiconductor laser array

1998-05-18

2000-09-05

Font, Frank G.

Coherent light generators

Particular active media

Semiconductor

372 33, 372 36, 372 50, H01S 300, H01S 304, H01S 500

Patent

active

061153982

ABSTRACT:
Automatic power control (APC) of a semiconductor laser array is achieved by monitoring the backward emission emitted by a plurality of semiconductor devices which compose the semiconductor laser array. The drive signal to the laser is adjusted based on the detected emissions. A photosensor mounted in a submount, to which the semiconductor laser array is mounted, is positioned to receive a photocurrent from the backward emissions. A sweeping injection current across the laser array provides for the sequential detection of the backward emission and thus provides for automatic power control (APC).

REFERENCES:
patent: 5016253 (1991-05-01), Kubota
patent: 5032879 (1991-07-01), Buchmann et al.

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