Title :
Diode Laser Frequency Locking to an Etalon With a Double-Pass Acousto-Optic Frequency Shifter
Author :
Che-Chung Chou ; Shine-Chieh Lin ; Lin, Tao ; Sheng-Hua Lu
Author_Institution :
Dept. of Photonics, Feng Chia Univ., Taichung, Taiwan
Abstract :
We demonstrate an optical heterodyne spectroscopy on the reflection of an etalon using a double-pass acousto-optics frequency shifter. The experiment setup is a modified Michelson interferometer using the double-pass acousto-optics frequency shifter as the beam splitter and one etalon as the end mirror. Without using frequency modulation, the dispersion-like signal of the etalon reflection was successfully observed and optimized. Using the dispersion-like signal as an error signal, we locked a 780-nm external cavity diode laser to one resonant mode of the etalon. The estimated relative stability was ~2.6 × 10-10 in 0.16-s integration time.
Keywords :
Michelson interferometers; acousto-optical devices; laser cavity resonators; laser frequency stability; laser mirrors; laser mode locking; light reflection; optical beam splitters; optical dispersion; semiconductor lasers; beam splitter; dispersion-like signal optimization; double-pass acousto-optic frequency shifter; end mirror; etalon reflection; external cavity diode laser frequency locking; external cavity diode laser frequency stability; modified Michelson interferometer; optical heterodyne spectroscopy; time 0.16 s; wavelength 780 nm; Diode lasers; Frequency modulation; Laser stability; Optical interferometry; Optical mixing; Resonant frequency; Semiconductor lasers; Optical heterodyne spectroscopy; acousto-optics frequency shifter; etalon; laser frequency stabilization;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2322596
