High-sensitivity temperature sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber  

作　　者：程旭升 邱薇薇 武文轩 罗艳华 田秀杰 张其锦 朱冰 

机构地区：[1]Department of Electronic Engineering and Information Science, University of Science and Technology of China [2]Anhui Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering,University of Science and Technology of China

出　　处：《Chinese Optics Letters》2011年第2期8-10,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 50703038, 50773075,21074123, and 50973101);the Chinese Academy of Sciences (Nos. kjcx3.syw.H02 and kjcx2-yw-m11);China Postdoctoral Science Foundation (No. 20100470038);the "Hundred Talents Program" of the Chinese Academy of Sciences

摘　　要：A single-mode polymer optical fiber （POF） with highly photosensitive core doped with benzil dimethyl ketal （BDK） is fabricated and used for writing Bragg grating through the two-beam interference method. The Bragg wavelength of the grating is about 1570 nm, while the full-width at half-maximum （FWHM） of the reflection peak is 0.3 nm. The temperature response of POF Bragg grating is theoretically analyzed and experimentally measured in contrast to silica optical fiber Bragg grating （FBG）. The result shows that the temperature character of POF Bragg grating is negative, which is opposite to the silica optical FBG. The absolute value of the temperature response of POF Bragg grating is one order of magnitude higher than that of the silica optical FBG, making POF Bragg grating appear to be very attractive for constructing temperature sensors with high resolution.A single-mode polymer optical fiber （POF） with highly photosensitive core doped with benzil dimethyl ketal （BDK） is fabricated and used for writing Bragg grating through the two-beam interference method. The Bragg wavelength of the grating is about 1570 nm, while the full-width at half-maximum （FWHM） of the reflection peak is 0.3 nm. The temperature response of POF Bragg grating is theoretically analyzed and experimentally measured in contrast to silica optical fiber Bragg grating （FBG）. The result shows that the temperature character of POF Bragg grating is negative, which is opposite to the silica optical FBG. The absolute value of the temperature response of POF Bragg grating is one order of magnitude higher than that of the silica optical FBG, making POF Bragg grating appear to be very attractive for constructing temperature sensors with high resolution.

关 键 词：Fiber Bragg gratings Fiber optic sensors Light sensitive materials Optical fibers PHOTOSENSITIVITY SILICA Temperature sensors 

分 类 号：TN253[电子电信—物理电子学] TS802.4[轻工技术与工程]