Driving and stabilization system for pump laser
AssigneesChongqing Institute of East China Normal University, Roi Optoelectronics Technology Co, Ltd., East China Normal University
InventorsHeping Zeng, Xiao Wang, Shuang Li, Mengyun Hu
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Abstract
A driving and stabilization system for a pump laser, and a pump laser system. The driving and stabilization system includes a constant current stabilization device, a constant temperature stabilization device, a power detection device, an environment detection device, and a control device. The constant current stabilization device includes a voltage comparison circuit, a constant current driving circuit, and a switch protection circuit. The constant temperature stabilization device includes an internal constant temperature stabilization circuit and an external constant temperature stabilization circuit.
Claims16
A driving and stabilization system for a pump laser, the pump laser comprising a laser diode, a semiconductor cooler and a laser detector, and connected to a stabilization grating at a tail thereof;
- the driving and stabilization system comprising:
- a control device configured to output a constant current algorithm voltage by a built-in algorithm of the control device, and output a switching signal;
- a constant current stabilization device comprising:
- a voltage comparison circuit configured to receive and compare a constant current setting voltage, the constant current algorithm voltage and a constant current feedback voltage from the control device to output a constant current control voltage according to a comparison result,
- a constant current driving circuit connected to the laser diode, and configured to receive the constant current control voltage from the voltage comparison circuit and output a constant driving current according to the constant current control voltage, and
- a switch protection circuit connected to the laser diode, and configured to receive the switching signal from the control device to control the passage of the constant driving current through the laser diode;
- a constant temperature stabilization device comprising:
- an internal constant temperature stabilization circuit connected to the semiconductor cooler in the pump laser, and configured to receive an internal temperature control parameter and output a first PWM temperature control signal to the semiconductor cooler in the pump laser according to the internal temperature control parameter, and
- an external constant temperature stabilization circuit connected to an external semiconductor cooler at the stabilization grating, and configured to receive an external temperature control parameter and output a second PWM temperature control signal to the external semiconductor cooler at the stabilization grating according to the external temperature control parameter;
- a power detection device connected to the laser detector in the pump laser, and configured to receive a power detection current from the pump laser and output a power detection voltage to the control device;
- and
- an environment detection device connected to a grating environment temperature resistor and a system environment temperature resistor, and configured to receive a grating environment voltage from the grating environment temperature resistor and a system environment voltage from the system environment temperature resistor, and output an environment detection voltage to the control device.
Dependencies are inferred from the claim text.