Compact diaphragm-based optical accelerometers with µg/âHz resolution.
Opt Lett
; 45(14): 3933-3936, 2020 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-32667322
ABSTRACT
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 13µg/âHz at 100 Torr, and 712ng/âHz at 20 mTorr.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2020
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Article