Method for Stabilizing the Frequency of an Unmodulated Laser Output*
- 1 January 1972
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 62 (1) , 24-29
- https://doi.org/10.1364/josa.62.000024
Abstract
The frequency of the 0.6328-µm output of a helium-neon laser has been servocontrolled at the peak of a passband of a quartz Fabry-Perot étalon whose temperature is stabilized by means of a triple point cell of diphenyl ether. The output of the laser is modulated by a retroreflector employing a lens and a vibrating mirror, and an error signal is detected by a lockin amplifier. Experiments have shown the long-term stability of 1.4×10-9. The resulting frequency-stabilized output is free of modulation and capable of being used for long-path-difference interferometry.Keywords
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