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Chin. Opt. Lett.
 Home  List of Issues    Issue 09 , Vol. 15 , 2017    10.3788/COL201715.090602


High temperature-sensitivity sensor based on long period fiber grating inscribed with femtosecond laser transversal-scanning method
Xinran Dong, Zheng Xie, Yuxin Song, Kai Yin, Dongkai Chu, and Ji’an Duan
State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, [Central South University], Changsha 410083, China

Chin. Opt. Lett., 2017, 15(09): pp.090602

DOI:10.3788/COL201715.090602
Topic:Fiber optics and optical communication
Keywords(OCIS Code): 060.0060  060.2370  140.7090  120.6780  

Abstract
We propose a high temperature-sensitive long period fiber grating (LPFG) sensor fabricated by using the femtosecond laser transversal-scanning method. The femtosecond pulses scan over the whole fiber core and some part of the cladding region; the modified regions are more extended. It is found that the LPFG-I fabricated by the transversal-scanning method shows higher temperature sensitivity and better temperature uniformity than that of LPFG-II written by the femtosecond laser point-by-point method. The LPFG-I with a temperature sensitivity of 75.96 pm/°C in the range of 25°C–400°C is measured. Moreover, in the range from 400°C to 800°C, a higher temperature sensitivity of 148.64 pm/°C and good linearity of 0.99 are achieved, while the temperature sensitivity of LPFG-II is only 95.55 pm/°C. LPFG-I exhibits better temperature characteristics, which, to the best of our knowledge, has the highest sensitivity in silica fiber temperature sensors.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2017/2/12
Accepted:2017/6/6
Posted online:2017/6/30

Get Citation: Xinran Dong, Zheng Xie, Yuxin Song, Kai Yin, Dongkai Chu, and Ji’an Duan, "High temperature-sensitivity sensor based on long period fiber grating inscribed with femtosecond laser transversal-scanning method," Chin. Opt. Lett. 15(09), 090602(2017)

Note: This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 91323301, 51505505, 51475482, and 51475481), the Natural Science Foundation of Hunan Province (No. 2016JJ3147), the China Postdoctoral Science Foundation (Nos. 2015M572264 and 2016T90757), the Self-selected Topic Fund of State Key Laboratory of High Performance and Complex Manufacturing (No. ZZYJKT2015-08), and the Fundamental Research Funds for the Central Universities of Central South University.



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