Coherent light generators – Particular component circuitry – Optical pumping
Patent
1997-12-17
2000-07-18
Bovernick, Rodney
Coherent light generators
Particular component circuitry
Optical pumping
H01S 300
Patent
active
060917482
ABSTRACT:
A semiconductor laser drive circuit for supplying an electric current to a semiconductor laser includes a laser power supply which supplies an electric current of a positive or negative voltage to the semiconductor laser, an operational amplifier which is driven by a positive amplifier power supply and a negative amplifier power supply, and a current control element which controls the amount of electric current flowing into the semiconductor laser according to the output of the operational amplifier. A sequence circuit causes one of the amplifier power supplies, which one is reverse in polarity as the laser power supply, to start first and then causes the other amplifier power supply to start after the former amplifier power supply achieves a steady voltage.
REFERENCES:
patent: 5276697 (1994-01-01), Davis
patent: 5530261 (1996-06-01), Yasuda
Bovernick Rodney
Fuji Photo Film Co. , Ltd.
Stahl Michael J.
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