Semiconductor laser driving circuit, semiconductor laser device,

Details Semiconductor laser driving circuit, semiconductor laser device, Semiconductor laser driving circuit, semiconductor laser device,

1998-09-10

2000-08-29

Sanghavi, Hemang

Coherent light generators

Particular component circuitry

Optical pumping

372 31, 372 33, 437237, 437247, H01S 300

Patent

active

061119016

ABSTRACT:
There is provided a semiconductor laser driving circuit. The circuit has: an amplifier for receiving an emission level setting voltage, and outputting a first driving signal on the basis of the emission level setting voltage; a driving signal generation circuit for receiving a control signal for instructing a light-emission period of a semiconductor laser, and the first driving signal output from said amplifier, and outputting a second driving signal corresponding to a level of the first driving signal in accordance with a light-emission or extinction period; a driving circuit for receiving the second driving signal output from said driving signal generation circuit, and generating and outputting a driving current to be supplied to the semiconductor laser; and a control circuit for receiving the emission level setting voltage, and adjusting a level of the second driving signal during the extinction period in correspondence with the emission level setting voltage.

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patent: 5438582 (1995-08-01), Hoshino et al.
patent: 5978124 (1999-11-01), Maekawa et al.

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