APPARATUS AND METHOD FOR STABILIZING PULSE LASER OUTPUT

摘要

A pulse laser output stabilizing apparatus including a directional coupler to receive output of pulse laser, the output branching into a first optical path and a second optical path, a photodetector to receive light branching into the first optical path and output current according to intensity of the light, a current-voltage converter to convert output current of the photodetector into a voltage and output converted voltage, a function generator to provide an output proportional to output signal of the current-voltage converter with a predetermined frequency, a time delay unit on the second optical path providing a predetermined time delay for feedback control, and an acousto-optic tunable modulator to receive output signal of the functional generator and optical signal from the time delay unit as an input and modulate and output the optical signal from the time delay unit according to amplitude of the output signal of the function generator.

主权项

1. A pulse laser output stabilizing apparatus comprising:
a directional coupler configured to receive an output of pulse laser such that the output branches into a first optical path and a second optical path; a photodetector configured to receive light branching into the first optical path and output current according to the intensity of the light; a current-voltage converter configured to convert output current of the photodetector into a voltage and output the converted voltage; a function generator configured to provide an output proportional to an output signal of the current-voltage converter with a predetermined frequency; a time delay unit disposed on the second optical path to provide a predetermined time delay for feedback control; and an acousto-optic tunable modulator configured to receive an output signal of the functional generator and an optical signal provided from the time delay unit as an input and modulate and output the optical signal provided from the time delay unit according to the amplitude of the output signal of the function generator.