title: Distributed-feedback fiber laser sensor for simultaneous strain and temperature measurements operating in the radio-frequency domain.
abstract: Radio-frequency (rf) beat frequencies between two longitudinal modes and two polarization modes of a birefringent dual-longitudinal-mode moiré distributed-feedback fiber laser are employed to measure strain and temperature simultaneously. Operating entirely in the rf domain, this approach potentially allows one to employ low-cost and precise rf measuring techniques. A strain-temperature cross sensitivity of the strain- and the thermo-optic coefficients, which can be neglected in wavelength-based grating sensors, has been observed. The achieved sensor accuracy was +/-15 microepsilon and +/-0.2 degrees C.
authors.affiliation: Optoelectronics Research Centre, University of Southampton, UK. oh@orc.soton.ac.uk
authors.forename: O
authors.initials: O
authors.lastname: Hadeler
authors.forename: M
authors.initials: M
authors.lastname: Ibsen
authors.forename: M N
authors.initials: MN
authors.lastname: Zervas