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

Davide Gatti | Zendy; G. Galzerano | Zendy; Davide Janner | Zendy; Stefano Longhi | Zendy; P. Laporta | Zendy

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

Author(s) -

Davide Gatti,

G. Galzerano,

Davide Janner,

Stefano Longhi,

P. Laporta

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.001945

Subject(s) - optics , fiber bragg grating , materials science , grating , laser , fiber laser , optoelectronics , physics

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.

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