Wang, Pengfei, Murugan, G.S., Lee, T., Ding, M., Brambilla, G., Semenova, Y., Wu, Q., Koizumi, F. and Farrell, G.
High-Q bismuth silicate nonlinear glass microsphere resonators.
IEEE Photonics Journal, 4, (3), . (doi:10.1109/JPHOT.2012.2202385).
The fabrication and characterization of a bismuth-silicate glass microsphere resonator has been demonstrated. At wavelengths near 1550 nm, high-modes can be efficiently excited in a 179-?m diameter bismuth-silicate glass microsphere via evanescent coupling using a tapered silica fiber with a waist diameter of circa 2 ?m. Resonances with Q-factors as high as were observed. The dependence of the spectral response on variations in the input power level was studied in detail to gain an insight into power-dependent thermal resonance shifts. Because of their high nonlinearity and high- factors, bismuth-silicate glass microspheres offer the potential for robustly assembled fully integrated all-optical switching devices
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