Title :
Fiber Bragg grating strain sensor demodulator using a chirped fiber grating
Author :
Kim, Sungchul ; Kim, Seungwoo ; Kwon, Jaejoong ; Lee, Byoungho
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A fiber Bragg grating (FBG) sensor demodulator using a chirped fiber grating is proposed. The demodulator uses UV-induced birefringence of chirped fiber grating to interrogate the wavelength shift of a sensor FBG. The demodulator is composed of a polarizing beam splitter, a polarization controller, a single-mode fiber, and a chirped fiber grating. The proposed demodulator is immune to light power fluctuation and is cost-effective.
Keywords :
Bragg gratings; birefringence; chirp modulation; demodulators; fibre optic sensors; fluctuations; optical beam splitters; optical polarisers; strain sensors; UV-induced birefringence; chirped fiber grating; fiber Bragg grating strain sensor demodulator; light power fluctuation; polarization controller; polarizing beam splitter; single-mode fiber; wavelength shift; Bragg gratings; Capacitive sensors; Chirp; Demodulation; Fiber gratings; Intelligent sensors; Optical fiber polarization; Optical fiber sensors; Optical fibers; Temperature sensors;
Journal_Title :
Photonics Technology Letters, IEEE
