Whispering gallery mode microsphere resonator integrated inside a microstructured optical fiber

Optics Letters (Impact Factor: 3.18). 04/2013; 38(8):1301-3. DOI: 10.1364/OL.38.001301
Source: PubMed

ABSTRACT A compact and robust scheme for broadband excitation of whispering gallery mode (WGM) resonances into a microsphere is demonstrated. A polymer microsphere (10 μm) is encapsulated into the capillary of a microstructured optical fiber, in direct contact with the guiding core. Such a configuration allows efficient and reproducible excitation of the in-MOF-microsphere resonator that is characterized by two launch/collection schemes: core input/scattering output, and sphere input/core output. The latter allows an excitation of the microsphere WGMs externally to the fiber. Numerically calculated WGM spectra are in agreement with experiments. Q factors in the range of 103 are typically measured.

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Mar 4, 2015