Published in
American Institute of Physics, Applied Physics Letters, 18(98), p. 181105
DOI: 10.1063/1.3586771
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Lead silicate glass microsphere resonators with absorption-limited Q
,
Yuliya Semenova ,
Qiang Wu,
Wei Loh,
Gilberto Brambilla ,
James S. Wilkinson,
Gerald Farrell
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Abstract
We report the fabrication and characterization of a lead-silicate glass microsphere resonator. We show that at the wavelengths near 1555 nm high Q modes can be efficiently excited from a 109 μm diameter lead-silicate glass microsphere via evanescent coupling using a tapered silica fiber with a waist diameter of 2 μm. Resonances with Q-factors as high as 0.9 x 10^7 were observed. This is very close to the theoretical material-limited Q-factor and is the highest Q-factor reported so far from a nonlinear glass microsphere