A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT PROGRAM
The present invention was developed with support from the U.S. government under Grant No. 0457269 awarded by the National Science Foundation, Grant No. DE-FG02-86ER13491 awarded by the Department of Energy, and Grant No. W911NF-07-1-0475 awarded by the U.S. Army Research Office. Accordingly, the U.S. government has certain rights in the present invention.