Sub-hertz frequency stabilization of a commercial diode laser
Y. N. Zhao, J. Zhang, J. Stuhler, G. Schuricht, F. Lison, Z. H. Lu,, and L. J. Wang
TL;DR
This paper demonstrates ultra-stable frequency locking of a commercial diode laser to a vibration-insensitive cavity, achieving sub-Hz linewidth and high stability without vibration isolation.
Contribution
It introduces a method for sub-hertz frequency stabilization of a commercial diode laser using a high finesse Fabry-Perot cavity with a 2 MHz servo bandwidth.
Findings
Achieved 2.95×10^{-15} Allan deviation at 1 s
Realized 0.93 Hz linewidth
Demonstrated stability without vibration isolation
Abstract
We report ultra-stable locking of a commercially available extended cavity diode laser to a vibration-insensitive high finesse Fabry-Perot cavity. A servo bandwidth of 2 MHz is demonstrated. The absolute stability of the diode laser after locking is measured with a three-cornered-hat method. The resulting Allan deviation reaches a level of at 1 s, corresponding to only 0.93 Hz linewidth, even without vibration isolation of the reference cavity.
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