Semiconductor laser driver system

Details Semiconductor laser driver system Semiconductor laser driver system

1986-05-13

1989-03-28

Sikes, William L.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 31, 372 33, H01S 313

Patent

active

048170984

ABSTRACT:
Light quantity and temperature settings are applied by a control circuit to a semiconductor laser controller and a temperature controller, respectively. A temperature actuator is controlled by the temperature controller responsive to an output signal from a temperature sensor for equalizing the temperature of a semiconductor laser to the temperature setting. The semiconductor laser is controlled by the semiconductor laser controller responsive to an output signal from a light quantity sensor so that a laser beam will be emitted from the semiconductor laser at the light quantity setting. Mode hoping noise is detected by a mode hopping noise detector or the control circuit in combination with a memory which stores mode hopping noise ranges. In response to a mode hopping noise signal, the control circuit changes at least one of the light quantity and temperature settings.

REFERENCES:
patent: 4450565 (1984-05-01), Copeland
patent: 4618958 (1986-10-01), Shibata et al.
patent: 4630273 (1986-12-01), Inoue et al.

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