title: Linearly chirped tapered fiber-Bragg-grating-based Fabry-Perot cavity and its application in simultaneous strain and temperature measurement.
abstract: A novel concept of a Fabry-Perot (F-P) cavity composed of two linearly chirped fiber Bragg gratings written in a thermally fused fiber taper is presented. Both chirped gratings are written in counter-directional chirp configuration, where chirps resulting from the optical fiber taper profile and linearly increasing grating periods cancel each other out, forming a high-quality F-P resonator. A new strain-sensing mechanism is proposed in the presented structure, which is based on strain-induced detuning of the F-P resonator. Due to the different strain and temperature responses of the cavity, the resonator can be used for the simultaneous measurement of these physical quantities, or it can be used as a temperature-independent strain sensor.
authors.forename: Konrad
authors.initials: K
authors.lastname: Markowski
authors.forename: Kazimierz
authors.initials: K
authors.lastname: Jędrzejewski
authors.forename: Michał
authors.initials: M
authors.lastname: Marzęcki
authors.forename: Tomasz
authors.initials: T
authors.lastname: Osuch