Slow Light Frequency Reference Cavities -- Proof of Concept for Reducing
the Frequency Sensitivity Due to Length Fluctuations
- URL: http://arxiv.org/abs/2104.03880v2
- Date: Mon, 18 Apr 2022 00:57:40 GMT
- Title: Slow Light Frequency Reference Cavities -- Proof of Concept for Reducing
the Frequency Sensitivity Due to Length Fluctuations
- Authors: Sebastian P. Horvath, Chunyan Shi, David Gustavsson, Andreas Walther,
Adam Kinos, Stefan Kr\"oll, and Lars Rippe
- Abstract summary: We present a laser-frequency stabilization concept using an optical cavity with a strong slow-light effect to reduce the impact of cavity length changes on the frequency stability.
Compared to the same setup in the absence of the slow-light effect a reduction in frequency sensitivity of four orders of magnitude was achieved.
- Score: 0.43556391457088783
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Length changes due to thermo-mechanical noise originating from, for example,
Brownian motion are a key limiting factor of present day state-of-the-art laser
frequency stabilization using Fabry-P\'erot cavities. We present a
laser-frequency stabilization concept using an optical cavity with a strong
slow-light effect to reduce the impact of cavity length changes on the
frequency stability. The resulting noise-reduction factor is proportional to
the ratio between the light phase and group velocities in the highly dispersive
cavity spacer. We experimentally demonstrate a proof-of-principle
implementation of this laser-frequency stabilization technique using a
rare-earth doped crystalline cavity spacer in conjunction with semi-permanent
spectral tailoring to achieve precise control of the dispersive properties of
the cavity. Compared to the same setup in the absence of the slow-light effect
a reduction in frequency sensitivity of four orders of magnitude was achieved.
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