Compact diaphragm-based optical accelerometers with µg/√Hz resolution
A compact fiber accelerometer that meets the resolution requirement for aircraft navigation is reported. It detects extremely weak acceleration-induced vibrations of a spring-loaded diaphragm using a two-wave interferometer with a π / 2 biasing step micro-fabricated on the diaphragm. A single-mode f...
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| Veröffentlicht in: | Optics letters 2020-07, Vol.45 (14), p.3933-3936 |
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| container_end_page | 3936 |
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| container_issue | 14 |
| container_start_page | 3933 |
| container_title | Optics letters |
| container_volume | 45 |
| creator | Habib Afshar, Behrad Digonnet, Michel J. F. |
| description | A compact fiber accelerometer that meets the resolution requirement for aircraft navigation is reported. It detects extremely weak acceleration-induced vibrations of a spring-loaded diaphragm using a two-wave interferometer with a π / 2 biasing step micro-fabricated on the diaphragm. A single-mode fiber provides a laser beam that interrogates the interferometer. This sensor has a measured flat-band sensitivity with a bandwidth of 10.7 kHz, and a resolution limited by thermo-mechanical noise of 13 µ g / √ H z at 100 Torr, and 712 n g / √ H z at 20 mTorr. |
| doi_str_mv | 10.1364/OL.395737 |
| format | Article |
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| identifier | ISSN: 0146-9592 |
| ispartof | Optics letters, 2020-07, Vol.45 (14), p.3933-3936 |
| issn | 0146-9592 1539-4794 |
| language | eng |
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| source | Optica Publishing Group Journals |
| title | Compact diaphragm-based optical accelerometers with µg/√Hz resolution |
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