Thermorefringent noise in crystalline optical materials
Crystalline materials are increasingly employed to construct precision optical instruments because of their reduced mechanical dissipation and consequent reduction of thermal Brownian noise. However, the anisotropy of the crystalline state implies a fundamental source of thermal noise; depolarizatio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024
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| Online Access: | https://hdl.handle.net/1721.1/154849 |
| _version_ | 1826216598546939904 |
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| author | Kryhin, Serhii Hall, Evan D. Sudhir, Vivishek |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Kryhin, Serhii Hall, Evan D. Sudhir, Vivishek |
| author_sort | Kryhin, Serhii |
| collection | MIT |
| description | Crystalline materials are increasingly employed to construct precision optical instruments because of their reduced mechanical dissipation and consequent reduction of thermal Brownian noise. However, the anisotropy of the crystalline state implies a fundamental source of thermal noise; depolarization induced by thermal fluctuations of its birefringence. We establish the theory of this effect, which is a generalization of prior treatments of thermo-optic noises in amorphous materials. This theory—in conjunction with poorly understood anisotropic thermal stress coefficients of crystalline coatings—predict that thermo-refringent noise in crystalline mirror coatings may be lurking within an order of magnitude of Brownian noise (below 100 Hz). Thus, in order to appreciate the full promise of crystalline optical materials, a more precise understanding of their anisotropic material constants is necessary. Barring that, we elucidate measurement techniques that can affect partial coherent cancellation of thermorefringent noise. In passing, our general formalism also predicts the existence of thermal beam-pointing noise. |
| first_indexed | 2024-09-23T16:49:46Z |
| format | Article |
| id | mit-1721.1/154849 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2025-02-19T04:25:58Z |
| publishDate | 2024 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1548492025-01-03T04:11:22Z Thermorefringent noise in crystalline optical materials Kryhin, Serhii Hall, Evan D. Sudhir, Vivishek Massachusetts Institute of Technology. Department of Physics LIGO (Observatory : Massachusetts Institute of Technology) Massachusetts Institute of Technology. Department of Mechanical Engineering Crystalline materials are increasingly employed to construct precision optical instruments because of their reduced mechanical dissipation and consequent reduction of thermal Brownian noise. However, the anisotropy of the crystalline state implies a fundamental source of thermal noise; depolarization induced by thermal fluctuations of its birefringence. We establish the theory of this effect, which is a generalization of prior treatments of thermo-optic noises in amorphous materials. This theory—in conjunction with poorly understood anisotropic thermal stress coefficients of crystalline coatings—predict that thermo-refringent noise in crystalline mirror coatings may be lurking within an order of magnitude of Brownian noise (below 100 Hz). Thus, in order to appreciate the full promise of crystalline optical materials, a more precise understanding of their anisotropic material constants is necessary. Barring that, we elucidate measurement techniques that can affect partial coherent cancellation of thermorefringent noise. In passing, our general formalism also predicts the existence of thermal beam-pointing noise. 2024-05-07T14:42:33Z 2024-05-07T14:42:33Z 2023-01-03 2024-05-07T14:37:45Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 https://hdl.handle.net/1721.1/154849 Kryhin, Serhii, Hall, Evan D. and Sudhir, Vivishek. 2023. "Thermorefringent noise in crystalline optical materials." Physical Review D, 107 (2). en 10.1103/physrevd.107.022001 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Kryhin, Serhii Hall, Evan D. Sudhir, Vivishek Thermorefringent noise in crystalline optical materials |
| title | Thermorefringent noise in crystalline optical materials |
| title_full | Thermorefringent noise in crystalline optical materials |
| title_fullStr | Thermorefringent noise in crystalline optical materials |
| title_full_unstemmed | Thermorefringent noise in crystalline optical materials |
| title_short | Thermorefringent noise in crystalline optical materials |
| title_sort | thermorefringent noise in crystalline optical materials |
| url | https://hdl.handle.net/1721.1/154849 |
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