Abstract
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
efficiently excited in the microsphere using an evanescent field of the tapered silica optical fibers.
Resonances with quality factors of 1.3 \times 105 are 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.
© 2013 Chinese Optics Letters
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