title: High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing.
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 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.
authors.affiliation: Centre for Gravitational Physics, Department of Quantum Science, The Australian National University, 0200, Building 38 Science Road, Canberra, Australian Capital Territory, Australia. timothy.lam@anu.edu.au
authors.forename: Timothy T-Y
authors.initials: TT
authors.lastname: Lam
authors.forename: Jong H
authors.initials: JH
authors.lastname: Chow
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Shaddock
authors.forename: Ian C M
authors.initials: IC
authors.lastname: Littler
authors.forename: Gianluca
authors.initials: G
authors.lastname: Gagliardi
authors.forename: Malcolm B
authors.initials: MB
authors.lastname: Gray
authors.forename: David E
authors.initials: DE
authors.lastname: McClelland