Automatic control of laser diode current and optical power output

Automatic control of laser diode current and optical power output

An automatic power control system provides a control signal that regulates the output power of at least one laser diode. Coarse adjustment of the control signal is provided by a first means, preferably a digital variable resistor, while fine adjustment and compensation is provided by a second means,...

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Hauptverfasser: Kunst, David, Martinez, Steven, Lewandowski, Robert James, Chambers, Peter, Judkins, III, Joseph James, Torres, Luis, Lindsay, Tom
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Sprache:eng
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creator Kunst, David
Martinez, Steven
Lewandowski, Robert James
Chambers, Peter
Judkins, III, Joseph James
Torres, Luis
Lindsay, Tom
description An automatic power control system provides a control signal that regulates the output power of at least one laser diode. Coarse adjustment of the control signal is provided by a first means, preferably a digital variable resistor, while fine adjustment and compensation is provided by a second means, preferably by a digital-to-analog converter that receives an input signal proportional to a sensed control system parameter. The control system includes an operational amplifier having a first input coupled to sense output power, and a second input coupled to a DAC to provide finer resolution control. Memory can store system parameter or system parameter variations that can be coupled to the DAC and/or variable resistor to enhance system stability over ambient variations.
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title Automatic control of laser diode current and optical power output
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