RT Journal Article
T1 Fast Interrogation of Fiber Bragg Gratings with Electro-Optical Dual Optical Frequency Combs
A1 Posada Román, Julio Enrique
A1 García Souto, José Antonio
A1 Poiana, Dragos Andrei
A1 Acedo Gallardo, Pablo
AB Optical frequency combs (OFC) generated by electro-optic modulation of continuous-wave lasers provide broadband coherent sources with high power per line and independent control of line spacing and the number of lines. In addition to their application in spectroscopy, they offer flexible and optimized sources for the interrogation of other sensors based on wavelength change or wavelength filtering, such as fiber Bragg grating (FBG) sensors. In this paper, a dual-OFC FBG interrogation system based on a single laser and two optical-phase modulators is presented. This architecture allows for the configuration of multimode optical source parameters such as the number of modes and their position within the reflected spectrum of the FBG. A direct read-out is obtained by mapping the optical spectrum onto the radio-frequency spectrum output of the dual-comb. This interrogation scheme is proposed for measuring fast phenomena such as vibrations and ultrasounds.
PB MDPI
SN 1424-3210
YR 2016
FD 2016-11-26
LK https://hdl.handle.net/10016/38810
UL https://hdl.handle.net/10016/38810
LA eng
NO This work was supported by the Spanish Ministry of Economy and Competitiveness under Grant TEC2014-52147-R.
DS e-Archivo
RD 1 jul. 2024