Title :
FBG sensor for strain measurement with enhanced sensitivity by using degenerated FWM in highly nonlinear fibre
Author :
Du, Jinyang ; He, Zhaoshui
Author_Institution :
State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, People´s Republic of China
Abstract :
A method for enhancing the sensitivity of a fibre Bragg grating (FBG) sensor by all-optical signal processing is demonstrated. Degenerated four-wave mixing (FWM) has been used to perform frequency chirp magnification, which can be used for magnifying the wavelength drift of the FBG sensor. Ultra-highly sensitive measurement of the static strain has been experimentally demonstrated with strain sensitivity of 5.40 pm/με. The sensitivity has been enhanced by a factor of five.
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.1931
