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This letter proposes and demonstrates a fiber ring laser using taper-coupled double-microsphere-cavities (DMCs) to achieve single-longitudinal-mode operation. Whispering-gallery-mode (WGM) intensity distributions and transmission spectra of the DMC with different microsphere diameters are investigated both theoretically and experimentally. Due to the Vernier effect, the DMC can produce WGM spectra...
This paper proposes a novel fiber ring laser utilizing taper-coupled double-microsphere-cavities (TC-DMC) to stabilize its single-longitudinal-mode operating with a 0.01 nm narrow bandwidth. Fundamental properties including whispery gallery mode (WGM) mode distribution and transmission spectra in the DMC are investigated both theoretically and experimentally. Due to Vernier effect, the WGM spectrum...
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