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Double-heterodyne probing for ultra-stable laser based on spectral hole burning in a rare-earth doped crystal
- Source :
- Optics Letters, 45, 1930 (2020)
- Publication Year :
- 2020
-
Abstract
- We present an experimental technique for realizing a specific absorption spectral pattern in a rare-earth-doped crystal at cryogenic temperatures. This pattern is subsequently probed on two spectral channels simultaneously, thereby producing an error signal allowing frequency locking of a laser on the said spectral pattern. Appropriate combination of the two channels leads to a substantial reduction of the detection noise, paving the way to realizing an ultra-stable laser for which the detection noise can be made arbitrarily low when using multiple channels. We use such technique to realize a laser with a frequency instability of $1.7\times 10^{-15}$ at 1 second, not limited by the detection noise but by environmental perturbation of the crystal. This is comparable with the lowest instability demonstrated at 1 second to date for rare-earth doped crystal stabilized lasers.
- Subjects :
- Physics - Optics
Physics - Applied Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Optics Letters, 45, 1930 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2004.01752
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1364/OL.389833