Journal
OPTICS LETTERS
Volume 40, Issue 7, Pages 1567-1570Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.001567
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- European Research Council (ERC)
- Center National d'Etudes Spatiales (CNES) through the project SHYRO
- Region de Franche-Comte
- Labex ACTION
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We report the fabrication for the first time of a strontium fluoride (SrF2) whispering-gallery mode resonator with quality factor in excess of 1 billion. The millimeter-size disk-resonator is polished until the surface roughness decreases down to a root-mean square value of 1.2 nm, as measured with a vertical scanning profilometer. We also demonstrate that this ultrahigh Q resonator allows for the generation of a normal-dispersion Kerr optical frequency comb at 1550 nm. (C) 2015 Optical Society of America
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