Guoqing Yuan, Hong Li, Xinjian Luo, Lidan Lu, Lianqing Zhu. Fiber wedge end-face coupler for capillary whispering-gallery-mode resonators[J]. Infrared and Laser Engineering, 2023, 52(9): 20220851
- Infrared and Laser Engineering
- Vol. 52, Issue 9, 20220851 (2023)
Fig. 1. The coupling resonance of fiber wedge end face and micro-tubular cavity
Fig. 2. Optical field distribution and coupled resonance states of wedge-terminated fibers with different throw angles θ
Fig. 3. (a) Simulation design of coupling structure of fiber wedged end face and micro capillary tube; (b) Characteristic spectrum of Lorentz peak; (c) Characteristic spectrum of Lorentz dip
Fig. 4. Simulation of WGM coupled resonant spectrum.（a） Monitor1； （b） Monitor2
Fig. 5. Simulation of WGM coupled resonant transmission spectrum
Fig. 6. Diagram of wedge fiber under microscope
Fig. 7. Coupling resonance experimental test system
Fig. 8. (a) The structure position diagram of the fiber wedged end face and the micropipe cavity; (b) Microscope1 captures the main view image of the coupled structure; (c) Microscope2 captures the top view image of the coupled structure
Fig. 9. Resonance spectra of different coupling distances
Fig. 10. The local amplification diagram of WGM resonant transmission spectrum
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Table 1. Program parameters for fabrication of fiber wedge end coupler structure
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Table 2. Comparison of different coupling methods for capillary resonance
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