title: Demonstration of a passive subpicostrain fiber strain sensor.
abstract: We demonstrate a fiber Fabry-Perot (FFP) sensor that is capable of detecting subpicostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall (PDH) frequency locking technique. A low-power diode laser at 1550 nm is locked to a free-space reference cavity to suppress its free-running frequency noise, thereby stabilizing the laser. The stabilized laser is then used to interrogate a FFP sensor whose PDH error signal yields the instantaneous fiber strain.
authors.affiliation: Centre for Gravitational Physics, Faculty of Science, The Australian National University, Canberra, ACT 0200, Australia. jong.chow@anu.edu.au
authors.forename: Jong H
authors.initials: JH
authors.lastname: Chow
authors.forename: David E
authors.initials: DE
authors.lastname: McClelland
authors.forename: Malcolm B
authors.initials: MB
authors.lastname: Gray
authors.forename: Ian C M
authors.initials: IC
authors.lastname: Littler