Bandwidth Tunable Filter Based on Ideal Quasi-Critical Coupling State in WGM Cavity

Li, Jiwei; Hu, Yue; Gan, Xufan; Gao, Feng; Zhang, Wending; Huang, Ligang; Fang, Bo; Zhang, Guoquan; Xu, Jingjun

doi:10.1109/jlt.2021.3104397

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…Note that a waveguide has to be calibrated with the WGM within hundreds of nanometers to achieve high coupling efficiency. Therefore, the configuration with only one waveguide gains the advantages of simple structure, high efficiency, and high stability due to the quasi-critical coupling (QCC) effect of the WGM [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Tunable Narrow-Linewidth Ring Laser Based on the Polarization Conversion in a Tapered Fiber-Coupled Whispering Gallery Mode Resonator

et al. 2021

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Based on the polarization conversion in a tapered fiber-coupled whispering gallery mode (WGM) system, a simple-structured narrow linewidth band-pass filter was fabricated and a narrow linewidth ring laser was demonstrated. With a fiber Bragg grating (FBG) to further select the resonant mode, the ring laser could be in the single-longitudinal-mode with the linewidth about 6 kHz and its wavelength could be tuned from 1540.10 nm to 1570.01 nm. Benefit from the dense modes in the WGM resonator, high conversion efficiency, and better stability of the structure, a tunable dual-wavelength laser could be achieved based on two FBGs with different resonant wavelengths. The configuration of the proposed laser is simple and stable, which will benefit its applications in the future.

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Section: Introductionmentioning

confidence: 99%