Title :
Resonance peak shift and dual peak separation of long-period fiber gratings for sensing applications
Author :
Han, Young-Geun ; Lee, Byeong Ha ; Han, Won-Taek ; Paek, Un-Chul ; Chung, Youngjoo
Author_Institution :
Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., Kwangju, South Korea
fDate :
7/1/2001 12:00:00 AM
Abstract :
The systematic analysis of the relationship among the transmission characteristics of long-period fiber gratings, the initial coupling strength, and the fluence of the postexposure UV beam are discussed. The UV postexposure allows for adjustment of the peak depth depending on the initial coupling strength while red-shifting the resonance wavelength. Dual peak separation can occur for high-order cladding modes, and its application to sensing of the bending curvature, transverse load, and external refractive index are described.
Keywords :
diffraction gratings; fibre optic sensors; optical fibre fabrication; red shift; waveguide discontinuities; bending curvature; dual peak separation; external refractive index; fibre sensing applications; initial coupling strength; long-period fiber gratings; peak depth; postexposure UV beam; red-shifting; resonance peak shift; resonance wavelength; transmission characteristics; transverse load; Amplitude modulation; Bragg gratings; Chemical sensors; Fiber gratings; Filters; Optical coupling; Optical fiber devices; Optical fiber sensors; Refractive index; Resonance;
Journal_Title :
Photonics Technology Letters, IEEE
