High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing

High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing

We present a quasi-static fiber optic strain sensing system capable of resolving signals below nanostrain from 20 mHz. A telecom-grade distributed feedback CW diode laser is locked to a fiber Fabry-Perot sensor, transferring the detected signals onto the laser. An H(13)C(14)N absorption line is then...

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Veröffentlicht in:Applied Optics 2010-07, Vol.49 (21), p.4029-4033
Hauptverfasser: Lam, Timothy T-Y, Chow, Jong H, Shaddock, Daniel A, Littler, Ian C M, Gagliardi, Gianluca, Gray, Malcolm B, McClelland, David E
Format: Artikel
Sprache:eng
Schlagworte:
ABSORPTION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
FABRY-PEROT INTERFEROMETER
FEEDBACK
FIBERS
LASER RADIATION
RESOLUTION
SENSORS
STRAINS
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Beschreibung
Zusammenfassung:We present a quasi-static fiber optic strain sensing system capable of resolving signals below nanostrain from 20 mHz. A telecom-grade distributed feedback CW diode laser is locked to a fiber Fabry-Perot sensor, transferring the detected signals onto the laser. An H(13)C(14)N absorption line is then used as a frequency reference to extract accurate low-frequency strain signals from the locked system.
ISSN:0003-6935
2155-3165
1539-4522
DOI:10.1364/ao.49.004029