Fiber strain sensor based on a pi-phase-shifted Bragg grating and the Pound-Drever-Hall technique

Fiber strain sensor based on a pi-phase-shifted Bragg grating and the Pound-Drever-Hall technique

A fiber strain sensor based on a p-phase-shifted Bragg grating and an extended cavity diode laser is proposed. Locking the laser frequency to grating resonance by the Pound-Drever-Hall technique results in a strain power spectral density S(epsilon) (f) = (3 x 10(-19) f(-1) +2.6 x 10(-23)) epsilon(2)...

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Veröffentlicht in:Optics express 2008-02, Vol.16 (3), p.1945-1950
Hauptverfasser: Gatti, D, Galzerano, G, Janner, D, Longhi, S, Laporta, P
Format: Artikel
Sprache:eng
Schlagworte:
Computer-Aided Design
Elasticity
Equipment Design
Equipment Failure Analysis
Refractometry - instrumentation
Refractometry - methods
Reproducibility of Results
Sensitivity and Specificity
Stress, Mechanical
Transducers
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Beschreibung
Zusammenfassung:A fiber strain sensor based on a p-phase-shifted Bragg grating and an extended cavity diode laser is proposed. Locking the laser frequency to grating resonance by the Pound-Drever-Hall technique results in a strain power spectral density S(epsilon) (f) = (3 x 10(-19) f(-1) +2.6 x 10(-23)) epsilon(2)/Hz in the Fourier frequency range from 1 kHz to 10 MHz (epsilon being the applied strain), corresponding to a minimum sensitivity of 5 pepsilon Hz(-1/2) for frequencies larger than 100 kHz.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.16.001945