Open AccessFBG sensor for strain measurement with enhanced sensitivity by using degenerated FWM in highly nonlinear fibre
Author(s) -
Du Jiangbing,
He Zuyuan
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.1931
Subject(s) - sensitivity (control systems) , fiber bragg grating , materials science , optics , chirp , four wave mixing , signal (programming language) , wavelength , strain (injury) , mixing (physics) , magnification , optical fiber , optoelectronics , nonlinear optics , physics , electronic engineering , laser , computer science , engineering , medicine , quantum mechanics , programming language
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/μɛ. The sensitivity has been enhanced by a factor of five.