Ultra-high-Q tunable whispering-gallery-mode microresonator

Details Ultra-high-Q tunable whispering-gallery-mode microresonator Ultra-high-Q tunable whispering-gallery-mode microresonator

2009-01-30

arxiv.org/abs/0901.4921v2

PRL 103, 053901 (2009)

Physics

Optics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.103.053901

Typical microresonators exhibit a large frequency spacing between resonances and a limited tunability. This impedes their use in a large class of applications which require a resonance of the microcavity to coincide with a predetermined frequency. Here, we experimentally overcome this limitation with highly prolate-shaped whispering-gallery-mode "bottle microresonators" fabricated from standard optical glass fibers. Our resonators combine an ultra-high quality factor of 360 million, a small mode volume, and near lossless fibre coupling, characteristic of whispering-gallery-mode resonators, with a simple and customizable mode structure enabling full tunability.

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