In-fiber three-cavity coupling of whispering gallery mode resonators for narrow Fano resonance

IF 5 2区物理与天体物理 Q1 OPTICS Optics and Laser Technology Pub Date : 2025-04-15 DOI:10.1016/j.optlastec.2025.112966

Gang Yang , Lu Cai , Jun Liu , Yin-song Zhao , Zhi-wei Zhang , Fu-cheng Xiang , Yong Zhao

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Abstract

In-fiber whispering gallery mode resonators have demonstrated significant potential in addressing the low integration, transferability, and tuning stability of whispering gallery microcavities. However, designing highly sensitive and high-resolution in-fiber whispering gallery mode resonators for sensing remains a major challenge. Here, we report an in-fiber three-cavity coupling concept, enabling strong field-driven interactions to result in the splitting of energy level, unprecedented quality factor enhancement and a good Fano line shape that can improve the detection sensitivity considerably. Leveraging three-cavity mutual coupling, an unprecedented in-fiber quality factor of 1.11 × 10⁵ and an extraordinary Fano line shape of 119 dB/nm is achieved. Such a combination of three-cavity and fiber may provide ideas for improving the performance of in-fiber whispering gallery mode resonators, leading to the creation of next-generation optical sensors.

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窄范诺共振中窃窃廊模式谐振器的光纤内三腔耦合

光纤内啸声廊模式谐振器在解决啸声廊微腔的低集成度、可转移性和调谐稳定性等问题方面具有巨大潜力。然而，设计用于传感的高灵敏度和高分辨率光纤内啸声廊模式谐振器仍然是一项重大挑战。在这里，我们报告了一种光纤内三腔耦合概念，这种概念能使强场驱动的相互作用产生能级分裂、前所未有的品质因数增强和良好的法诺线形状，从而大大提高探测灵敏度。利用三腔相互耦合，实现了前所未有的 1.11 × 105 光纤内品质因数和 119 dB/nm 的非凡法诺线形状。这种三腔与光纤的结合可为提高光纤内whispering gallery模式谐振器的性能提供思路，从而创造出下一代光学传感器。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems