Dual-wavelength FBG inscribed by femtosecond laser for simultaneous measurement of high temperature and strain  

作　　者：朱永 梅浩 朱涛 张洁 Shizhuo Yin 

机构地区：[1].Key Laboratory for Optoelectronic Technology & System, Ministry of Education of China, College of Optoelectronie Engineering, Chongqing University, Chongqing 400030, China [2]Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA

出　　处：《Chinese Optics Letters》2009年第8期675-678,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 60707010);the Natural Science Foundation of Chongqing (CSTC,2007BB3125)

摘　　要：A novel fiber Bragg grating （FBG） with two transmission dips in 1310- and 1550-nm regions is proposed and inscribed by an infrared femtosecond laser. Formed by multi-photon ionization, this type of grating can withstand temperature as high as 800 ℃ which makes it suitable for harsh environment sensing. In addition, the temperature and strain affect these two dips in different ways, which enables simultaneous strain and temperature sensing. The fabrication, spectrum characterization, and temperature performance of this grating are introduced.A novel fiber Bragg grating （FBG） with two transmission dips in 1310- and 1550-nm regions is proposed and inscribed by an infrared femtosecond laser. Formed by multi-photon ionization, this type of grating can withstand temperature as high as 800 ℃ which makes it suitable for harsh environment sensing. In addition, the temperature and strain affect these two dips in different ways, which enables simultaneous strain and temperature sensing. The fabrication, spectrum characterization, and temperature performance of this grating are introduced.

关 键 词：PHOTOIONIZATION Pulsed laser applications Ultrashort pulses 

分 类 号：TN249[电子电信—物理电子学] TN253