Stable CW laser based on low thermal expansion ceramic cavity with 49 mHz/s frequency drift

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Stable CW laser based on low thermal expansion ceramic cavity with 49 mHz/s frequency drift

Ito, I; Silva, A; Nakamura, T; Kobayashi, Y; (2017) Stable CW laser based on low thermal expansion ceramic cavity with 49 mHz/s frequency drift. Optics Express , 25 (21) pp. 26020-26028. 10.1364/OE.25.026020. Green open access

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Abstract

We describe a CW laser stabilized to a low thermal expansion ceramic cavity which has a lower frequency drift rate than cavities based on ultralow-expansion glass (ULE), which are widely used as optical references. Two identical optical cavities with spacers of different material, ceramic and ULE, were assembled and the optical frequencies locked to each of these cavities were compared. The optical frequency drifts of both CW lasers were measured to within a precision of 10−11 in one second over the course of one year. The ceramic cavity had a long-term frequency drift rate of 4.9 mHz/s and the ULE cavity had one of 23 mHz/s.

Type:	Article
Title:	Stable CW laser based on low thermal expansion ceramic cavity with 49 mHz/s frequency drift
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1364/OE.25.026020
Publisher version:	https://doi.org/10.1364/OE.25.026020
Language:	English
Additional information:	This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI:	https://discovery.ucl.ac.uk/id/eprint/10112577