Title :
High Sensitive Refractive Index Sensor Based on Cladding Mode Recoupled Chirped FBG
Author :
Sun, An ; Wu, Zhishen
Author_Institution :
Int. Inst. for Urban Syst. Eng., Southeast Univ., Nanjing, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
A simple but highly sensitive refractometer based on chirped fiber Bragg grating (CFBG) is proposed and investigated experimentally. Intensive reflected cladding modes can be excited within a large wavelength range through a multimode fiber CFBG structure. Experimental results show that the intensity of reflected cladding modes in CFBG is modulated by surrounding refractive index (RI) changes, which provide a high sensitive and cost-effective solution for RI measurement.
Keywords :
Bragg gratings; chirp modulation; fibre optic sensors; optical fibre cladding; refractive index measurement; refractometers; RI measurement; chirped FBG; chirped fiber Bragg grating; cladding mode; high sensitive refractive index sensor; reflected cladding modes; refractometer; Fiber gratings; Optical fiber sensors; Optical fibers; Refractive index; Sensitivity; Chirped fiber Bragg grating; cladding mode; optical fiber sensors; refractive index measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2179931
