Evaluation of Fiber Noise Induced in Ultrastable Environments
| Autor: | Sho Okubo, Hajime Inaba, Feng-Lei Hong, Kazumoto Hosaka, Ken Kashiwagi, Masato Wada |
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| Rok vydání: | 2019 |
| Předmět: |
Optical fiber
Materials science business.industry 020208 electrical & electronic engineering Physics::Optics Spectral density 02 engineering and technology law.invention symbols.namesake Vibration isolation Fourier transform Optics law Electromagnetic shielding Phase noise 0202 electrical engineering electronic engineering information engineering symbols Electrical and Electronic Engineering Allan variance business Instrumentation Optical path length |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 68:2246-2252 |
| ISSN: | 1557-9662 0018-9456 |
| DOI: | 10.1109/tim.2018.2876052 |
| Popis: | Phase noise induced by environmental disturbance was greatly reduced when the optical fiber was installed in an ultrastable environment. In this paper, the optical fiber length was 10 m, and the reduction in the phase noise power spectral density was approximately 70 and 30 dB at Fourier frequencies of 10 mHz and 10 Hz, respectively. To evaluate faint fiber noise, we developed a modified Mach–Zehnder heterodyne interferometer with reduced optical path length fluctuation. The Allan deviation calculated from the phase noise was $7 \times 10^{-20}$ at a 1-s averaging time and reached $2 \times 10^{-21}$ at a 10 000-s averaging time (measurement bandwidth: 500 Hz). In addition, we revealed the frequency bands in which fiber noise is reduced by selectively removing the environmental stabilization measures of evacuation, vibration isolation, acoustic shielding, and temperature stabilization from an ultrastable environment. |
| Databáze: | OpenAIRE |
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