DocumentCode :
1462459
Title :
High-Temperature Annealing Behaviors of CO _{2} Laser Pulse-Induced Long-Period Fiber Grating in a Photonic Crystal Fiber
Author :
Rao, Yun-Jiang ; Duan, De-Wen ; Fan, Yan-En ; Ke, Tao ; Xu, Min
Author_Institution :
Key Lab. of Optoelectron. Technol. & Syst., Chongqing Univ., Chongqing, China
Volume :
28
Issue :
10
fYear :
2010
fDate :
5/15/2010 12:00:00 AM
Firstpage :
1530
Lastpage :
1535
Abstract :
High-temperature annealing behaviors of long-period fiber grating (LPFG) induced by high-frequency CO2 laser pulse in an endlessly single-mode photonic crystal fiber (ESM-PCF) are investigated in this paper. We find that the change difference of effective refractive index between the air holes cladding and the solid core of the ESM-PCF both in grating fabricating and in annealing processes with different mechanisms would cause resonant wavelength red shift. Through annealing the gratings under high temperature at 600°C-650°C, its stability, linearity, and repeatability to temperature and tensile strain responses under high temperature condition can be greatly enhanced. Our study shows that the changes in fiber glass structure would have significant influence on the optical properties of ESM-PCF LPFG and thus will help understanding of the forming mechanisms and physical characteristics of ESM-PCF LPFG. In addition, ESM-PCF LPFGs can be used as temperature or strain sensors after annealing at high temperature of 600°C-650°C.
Keywords :
annealing; carbon compounds; diffraction gratings; fibre optic sensors; holey fibres; laser materials processing; optical fibre cladding; optical fibre fabrication; optical pulse generation; photonic crystals; red shift; refractive index; strain sensors; temperature sensors; CO2; LPFG; air holes cladding; effective refractive index; endlessly single-mode photonic crystal fiber; fiber glass structure; high-temperature annealing; pulse-induced long-period fiber grating; strain sensors; temperature 600 degC to 650 degC; temperature sensors; tensile strain; wavelength red shift; Annealing; long-period fiber grating (LPFG); photonic crystal fiber (PCF); thermal stability;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2010.2047376
Filename :
5443480
Link To Document :
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