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

Year: 2010

Authors: Lam T. T-Y., Chow J. H., Shaddock D. A., Littler I. C. M., Gagliardi G., Gray M. B., McClelland D. E.

Autors Affiliation: Centre for Gravitational Physics, Department of Quantum Science, The Australian National University,0200, Building 38 Science Road, Canberra, Australian Capital Territory, Australia;
CNR – Istituto Nazionale di Ottica, Comprensorio Olivetti, Via Campi Flegrei, Pozzuoli, Naples, Italy

Abstract: 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 (HCN)-C-13-N-14 absorption line is then used as a frequency reference to extract accurate low-frequency strain signals from the locked system. (C) 2010 Optical Society of America

Journal/Review: APPLIED OPTICS

Volume: 49 (21)      Pages from: 4029  to: 4033

More Information: This research was supported by the Australian Research Council.
KeyWords: Fabry-Perot interferometers; Fiber optics; Locks (fasteners), Absolute frequency; Absorption lines; Distributed feedback; Fiber Fabry-Perot sensor; Fiber optic strain sensing systems; Frequency reference; High resolution; Quasi-static strains; Fiber optic sensors
DOI: 10.1364/AO.49.004029

Citations: 45
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