Title :
A Novel Grating Modulation Technique for Photonic Bandgap Fiber Gas Sensors
Author :
Lee, Kyung Shik ; Lee, Yoon Kyu ; Jang, Si Hyun
Author_Institution :
Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea
fDate :
5/15/2011 12:00:00 AM
Abstract :
We present a novel grating modulation technique for photonic bandgap fiber (PBF) gas sensors. The grating modulation technique involves modulating the Bragg wavelength around a specific gas absorption line and measuring the second-harmonic signals for optical gas sensing. The responses of the PBF gas sensors employing the grating modulation technique to different acetylene concentrations ranging from 0% to 10% agree well with the prediction. Both 0.8- and 1.3-m-long PBF gas sensors are demonstrated.
Keywords :
Bragg gratings; fibre optic sensors; gas sensors; optical harmonic generation; optical modulation; photonic band gap; Bragg wavelength; acetylene concentrations; distance 0.8 m; distance 1.3 m; gas absorption line; grating modulation; photonic bandgap fiber gas sensors; second-harmonic signals; Absorption; Fiber gratings; Gas detectors; Modulation; Optical fiber sensors; Fiber optics; optical fiber sensors; optical sensors;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2119472
