Highly stable in-fiber integrated silica microresonator

We demonstrate a compact in-fiber integrated microresonator based on a silica microsphere and microstructure fiber. Whispering-gallery-modes (WGMs) are effectively excited through evanescent field coupling between the silica microsphere and one of the input tube waveguides of negative curvature fibe...

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Veröffentlicht in:Applied physics letters 2020-05, Vol.116 (21)
Hauptverfasser: Yin, Jinde, Chen, Hao, Zhou, Zewen, Wei, Wenyin, Zhang, Bo, Yu, Yang, Jiang, Junfeng, Wei, Huifeng, Yan, Peiguang, Ruan, Shuangchen
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Sprache:eng
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Zusammenfassung:We demonstrate a compact in-fiber integrated microresonator based on a silica microsphere and microstructure fiber. Whispering-gallery-modes (WGMs) are effectively excited through evanescent field coupling between the silica microsphere and one of the input tube waveguides of negative curvature fiber. The WGM spectrum with the Q-factor of ∼2.56 × 103 and the extinction ratio of ∼15.2 dB is achieved. The transmission spectra evolution for 5 h reveals the long-term stability of WGM excitation. The experimental results indicate that the in-fiber integrated resonator has the advantages of high stability, high integration, robustness, alignment-free assembly structure, and low cost, motivating potential applications in the lab-in-fiber platform.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0006066