Lead silicate glass microsphere resonators with absorption-limited Q

Pengfei Wang, Ganapathy Senthil Murugan, Timothy Lee, Xian Feng, Yuliya Semenova, Qiang Wu, Wei Loh, Gilberto Brambilla, James S. Wilkinson, Gerald Farrell

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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 0.9×107 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.
Original languageEnglish
Pages (from-to)181105
JournalApplied Physics Letters
Issue number18
Publication statusPublished - 2011


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