Laser diode controller

Details Laser diode controller Laser diode controller

1997-05-30

1999-10-12

Bovernick, Rodney

Coherent light generators

Particular temperature control

372 38, 372 29, H01S 304

Patent

active

059663944

ABSTRACT:
A laser diode controller (30) having a constant current source (60) which supplies current to a laser diode (90) is disclosed. A current shunt switch (40) directs current to either the laser diode (90) or to a bypass circuit (42). A thermal compensator (70) alters a current level of the constant current source (60) as a function of on-time of the laser diode (90) to compensate for changes in optical power conversion efficiency due to temperature changes in the laser diode. A thermo electric cooler controller (80) maintains a constant temperature of a substrate on which the laser diode is mounted. In one embodiment, an array of sample and hold amplifiers (50) eliminates a need for multiple DACs.

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patent: 5513197 (1996-04-01), Koishi
patent: 5598040 (1997-01-01), Markis
patent: 5602860 (1997-02-01), Masonson

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