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We report the fabrication and optical characterization of spherical whispering gallery mode(WGM)resonators made from ultraviolet(UV)-curable adhesive.The fabricated microspheres have good sphericity and surface smoothness,and can directly adhere to the tip of half-tapered fibers for easy manipulation.WGMs are e?ciently excited in the microsphere using an evanescent field of the tapered silica optical fibers.Resonances with quality factors of 1.3×105are observed.The dependence of wavelength shifts of WGM resonances on the input light powers shows that the resonant wavelength of the proposed microsphere resonators can be tuned thermo-optically.
We report the fabrication and optical characterization of spherical whispering gallery mode (WGM) resonators made from ultraviolet (UV) -curable adhesive. Fabricated microspheres have good sphericity and surface smoothness, and can directly adhere to the tip of half-tapered fibers for easy manipulation.WGMs are e? ciently excited in the microsphere using an evanescent field of the tapered silica optical fibers. Resonances with quality factors of 1.3 × 105 aliased. The dependence of wavelength shifts of WGM resonances on the input light powers that that the resonant wavelength of the proposed microsphere resonators can be tuned thermo-optically.