Open AccessHigh-Q UV whispering gallery mode resonators made of angle-cut BBO crystals
Author(s) -
Guoping Lin,
Josef Fürst,
Dmitry Strekalov,
Ivan S. Grudinin,
Nan Yu
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.021372
Subject(s) - whispering gallery wave , resonator , optics , barium borate , birefringence , q factor , materials science , wavelength , polarization (electrochemistry) , optoelectronics , physics , laser , chemistry
We report an investigation on angle-cut beta barium borate (BBO) whispering gallery mode (WGM) resonators operating in the ultra violet (UV) wavelength range. A quality (Q) factor of 1.5 × 10(8) has been demonstrated at 370 nm. New upper bounds for the absorption coefficients of BBO are obtained from the Q factor measurements. Moreover, polarization rotations of WGMs in the angle-cut birefringent resonators are observed and investigated. To the best of our knowledge, this is not only the first reported demonstration of an angle-cut WGM resonator but also the first reported high Q WGM resonator in the UV region.