Journal
PHOTONICS RESEARCH
Volume 7, Issue 5, Pages 573-578Publisher
OPTICAL SOC AMER
DOI: 10.1364/PRJ.7.000573
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Funding
- National Key RAMP
- D Program of China [2016YFA0302500, 2017YFA0303703]
- National Natural Science Foundation of China (NSFC) [61435007, 11574144, 11621091, 61475099]
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This paper describes the specially designed geometry of a dry-etched large-wedge-angle silica microdisk resonator that enables anomalous dispersion in the 780 nm wavelength regime. This anomalous dispersion occurs naturally without the use of a mode-hybridization technique to control the geometrical dispersion. By fabricating a 1-mu m-thick silica microdisk with a wedge angle as large as 56 degrees and an optical Q-factor larger than 10(7), we achieve a visible Kerr comb that covers the wavelength interval of 700-897 nm. The wide optical frequency range and the closeness to the clock transition at 698 nm of Sr-87 atoms make our visible comb a potentially useful tool in optical atomic clock applications. (c) 2019 Chinese Laser Press.
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