Scattered light reduction in Sagnac Speed Meters with Tunable Coherence
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915893798240256 |
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| author | Eggers, Leonie Voigt, Daniel Gerberding, Oliver |
| author_facet | Eggers, Leonie Voigt, Daniel Gerberding, Oliver |
| contents | Sagnac Speed Meter and ring resonators can be used as high precision instruments, but they are limited in their sensitivity through scattered light causing non-linear noise. Here, we experimentally demonstrate a technique called Tunable Coherence, where the long coherence length of the laser is broken in a controlled way, to suppress the coupling of scattered light in a Sagnac interferometer. We demonstrate a scattered light suppression of 24.2 dB in a Sagnac interferometer and discuss the experimental limitations. Further, we show an analytical discussion on how Tunable Coherence could be a fundamental solution to light scattering back from optical surfaces into the counter propagating beam, which is an issue particularly in ring resonators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07383 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scattered light reduction in Sagnac Speed Meters with Tunable Coherence Eggers, Leonie Voigt, Daniel Gerberding, Oliver Optics Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology Instrumentation and Detectors Sagnac Speed Meter and ring resonators can be used as high precision instruments, but they are limited in their sensitivity through scattered light causing non-linear noise. Here, we experimentally demonstrate a technique called Tunable Coherence, where the long coherence length of the laser is broken in a controlled way, to suppress the coupling of scattered light in a Sagnac interferometer. We demonstrate a scattered light suppression of 24.2 dB in a Sagnac interferometer and discuss the experimental limitations. Further, we show an analytical discussion on how Tunable Coherence could be a fundamental solution to light scattering back from optical surfaces into the counter propagating beam, which is an issue particularly in ring resonators. |
| title | Scattered light reduction in Sagnac Speed Meters with Tunable Coherence |
| topic | Optics Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology Instrumentation and Detectors |
| url | https://arxiv.org/abs/2502.07383 |