Laser frequency stabilizing device, method and program

Details Laser frequency stabilizing device, method and program Laser frequency stabilizing device, method and program

2009-03-12

2010-11-16

Van Roy, Tod T (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S020000, C372S023000, C372S027000, C372S028000, C372S029010, C372S029014

Reexamination Certificate

active

07835411

ABSTRACT:
A laser frequency stabilizing device comprises a laser light producer operative to produce and emit a laser light containing a first and a second longitudinal mode light having different wavelengths; a spectrometer operative to spectrally decompose the laser light into the first longitudinal mode light and the second longitudinal mode light; a first detector operative to detect the light output signal from a absorption cell; a second and third detector operative to detect the signal intensity of the first and second longitudinal mode light; an actuator operative to change the resonant cavity length; a first drive controller operative to detect the saturated absorption signal from the light output signal detected at the first detector and control driving the actuator based on the saturated absorption signal; a second drive controller operative to control driving the actuator such that the signal intensity of the first longitudinal mode light detected at the second detector and the signal intensity of the second longitudinal mode light detected at the third detector have a ratio of a certain value; and a switcher operative to switch the control of the detector between the control by the first drive controller and the control by the second drive controller.

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