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17 March 2023 Cryogenic silicon cavity for record laser frequency stability
Dhruv Kedar, Jun Ye
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Proceedings Volume PC12437, Photonic Heat Engines: Science and Applications V; PC1243709 (2023) https://doi.org/10.1117/12.2655456
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Recent advances in laser frequency stabilization have enabled lasers to serve as precise probes of fundamental physics and optical local oscillators for all-optical timescales. Current state-of-the-art optical oscillators employ Fabry-Perot cavities made from monocrystalline silicon, designed to operate at cryogenic temperatures where the thermal expansion coefficient cross zero. It is an engineering challenge to design cryostats with low vibration noise and temperature fluctuations that do not compromise the realization of thermal-noise limited instability. Cryostat-free operation of cryogenic reference cavities is key to making the world's best narrow linewidth lasers transportable. In this regard, optical refrigeration is an attractive prospect as cryogenic operation is decoupled from the excess environmental noise associated with most cryostats. With payloads now being cooled to the regime of cryogenic silicon cavity operation, this milestone is significantly closer to realization.
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Dhruv Kedar and Jun Ye "Cryogenic silicon cavity for record laser frequency stability", Proc. SPIE PC12437, Photonic Heat Engines: Science and Applications V, PC1243709 (17 March 2023); https://doi.org/10.1117/12.2655456
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KEYWORDS
Cryogenics
Laser stabilization
Silicon
Semiconductor lasers
Oscillators
Coherence (optics)
Physics
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