Widely tunable SNAP microresonators via translation of side-coupled optical fibers
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866918309003264000 |
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| author | Sharma, Isha Sumetsky, Misha |
| author_facet | Sharma, Isha Sumetsky, Misha |
| contents | We demonstrate free spectral range (FSR) tunable Surface Nanoscale Axial Photonics (SNAP) microresonators induced by side-coupled parallel optical fiber segments. By translating one segment relative to the other, we tune the coupling length from $900~μ$m to $100~μ$m and thereby tune the microresonator FSR from $5$ pm to $50$ pm, with an estimated precision of better than $0.003$ pm. The microresonator Q-factor exceeds $10^5$ and can potentially be significantly increased in a clean lab environment. Possible applications of the demonstrated device include miniature and low-loss tunable delay lines and optical frequency comb generators, as well as ultraprecise tunable optical sensors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19799 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Widely tunable SNAP microresonators via translation of side-coupled optical fibers Sharma, Isha Sumetsky, Misha Optics We demonstrate free spectral range (FSR) tunable Surface Nanoscale Axial Photonics (SNAP) microresonators induced by side-coupled parallel optical fiber segments. By translating one segment relative to the other, we tune the coupling length from $900~μ$m to $100~μ$m and thereby tune the microresonator FSR from $5$ pm to $50$ pm, with an estimated precision of better than $0.003$ pm. The microresonator Q-factor exceeds $10^5$ and can potentially be significantly increased in a clean lab environment. Possible applications of the demonstrated device include miniature and low-loss tunable delay lines and optical frequency comb generators, as well as ultraprecise tunable optical sensors. |
| title | Widely tunable SNAP microresonators via translation of side-coupled optical fibers |
| topic | Optics |
| url | https://arxiv.org/abs/2601.19799 |