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Updated: Jan 29, 2026
12:21
Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
Published on: April 4, 2016
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Resonant response and mode conversion of the microsphere coupled with a microfiber coupler
Optics Letters
|February 16, 2019
Summary
We demonstrate tunable Lorentz and Fano resonances in a microsphere coupled with a biconical microfiber coupler (MFC). This system enables flexible narrow-linewidth optical filtering and sensing applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Microsphere resonators offer high Q-factors for resonant phenomena.
- Microfiber couplers (MFCs) provide efficient evanescent coupling for optical devices.
Purpose of the Study:
- To investigate the resonant response of a microsphere coupled to an MFC.
- To demonstrate tunable resonance behavior and mode conversion.
- To explore applications in optical filtering and sensing.
Main Methods:
- Experimental investigation of a microsphere coupled with a single- and/or few-mode fiber MFC.
- Analysis of resonance evolution (Lorentz to Fano) based on supermode phase difference.
- Characterization of mode conversion and LP11 mode purity.
Main Results:
- Demonstrated tunable Lorentz and Fano resonances along the MFC coupling region.
- Achieved a flexible narrow-linewidth add-drop filter with easy alignment and efficient evanescent coupling.
- Showcased microsphere mode conversion and analyzed LP11 mode purity at whispering gallery mode resonance.
Conclusions:
- The proposed MFC coupling system enables tunable resonant responses.
- Offers promising applications in optical filtering, sensing, mode switching, and micro-resonator-based frequency combs.
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