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 used as a frequency reference to extract accurate low-frequency strain signals from the locked system.
Lam
Timothy T-Y
TT
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
Chow
Jong H
JH
Shaddock
Daniel A
DA
Littler
Ian C M
IC
Gagliardi
Gianluca
G
Gray
Malcolm B
MB
McClelland
David E
DE