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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2506.06061 |
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| _version_ | 1866909641143746560 |
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| author | Kim, S. Stohr, J. Ham, B. S. |
| author_facet | Kim, S. Stohr, J. Ham, B. S. |
| contents | The Fisher information theory sets a fundamental bound on the minimum measurement error achievable from independent and identically distributed (i.i.d.) measurement events. The assumption of identical and independent distribution often implies a Gaussian distribution, as seen in classical scenarios like coin tossing and an optical system exhibiting Poisson statistics. In an interferometric optical sensing platform, this translates to a fundamental limit in phase sensitivity, known as the shot-noise limit (SNL), which cannot be surpassed without employing quantum techniques. Here, we, for the first time to the best of our knowledge, experimentally demonstrate a SNL-like feature on resolution of an unknown signal when intensity-product measurement technique is applied to N-divided MZI output subfields. Given the Poisson-distributed photon statistics, the N-divided subfields ensure the i.i.d. condition required by Fisher information theory. Thus, the N-fold intensity-product technique holds promise for enhancing the precision of conventional optical sensing platforms such as a fiber-optic gyroscope and wavelength meter, while preserving the original phase sensitivity of the output field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_06061 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Enhanced interferometric resolution via N-fold intensity-product measurements without sacrificing phase sensitivity Kim, S. Stohr, J. Ham, B. S. Optics The Fisher information theory sets a fundamental bound on the minimum measurement error achievable from independent and identically distributed (i.i.d.) measurement events. The assumption of identical and independent distribution often implies a Gaussian distribution, as seen in classical scenarios like coin tossing and an optical system exhibiting Poisson statistics. In an interferometric optical sensing platform, this translates to a fundamental limit in phase sensitivity, known as the shot-noise limit (SNL), which cannot be surpassed without employing quantum techniques. Here, we, for the first time to the best of our knowledge, experimentally demonstrate a SNL-like feature on resolution of an unknown signal when intensity-product measurement technique is applied to N-divided MZI output subfields. Given the Poisson-distributed photon statistics, the N-divided subfields ensure the i.i.d. condition required by Fisher information theory. Thus, the N-fold intensity-product technique holds promise for enhancing the precision of conventional optical sensing platforms such as a fiber-optic gyroscope and wavelength meter, while preserving the original phase sensitivity of the output field. |
| title | Enhanced interferometric resolution via N-fold intensity-product measurements without sacrificing phase sensitivity |
| topic | Optics |
| url | https://arxiv.org/abs/2506.06061 |