| Temperature-Insensitive Chemical Sensor with Twin Bragg Gratings in an Optical Fibre |
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| 作者姓名： | 桑新柱 余重秀 颜玢玢 马健新 孟照方 Mayteevarunyoo T. 吕乃光 |
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| 作者单位： | [1]Key Laboratory of Optical Communication and Lightwave Technologies, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876 [2]Department of Telecommunication Engineering, Mahanakorn University of Technology, Bangkok 10530, Thailand [3]Department of Electronic Information Engineering, Beijing Institute of Machinery, Beijing 100085 |
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| 基金项目： | Supported by the National Basic Research and Development Programme of China under Grant No 2003 CB314906, the Key Project of the National Natural Science Foundation of China under Grant No 60331010, the Scientific Research Common Programme of Beijing Municipal Commission of Education under Grant No KM200411232005, and the Initiating Grant For PhD Degree of School of Electronic Engineering, BUPT. |
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| 摘 要： | To reduce temperature sensitivity of the fibre Bragg grating （FBG） chemical sensor, a simple method is proposed by measuring the peak wavelength difference between an etched FBG and an un-etched one in an optical fibre. Thermal characteristics and chemical sensitivity of the sensor are experimentally investigated. The experimental results indicate that the etched FBG and the rest one have almost the same thermal response, and concentration changes of the surrounding chemical solutions can be detected by measuring the peak wavelength difference between them. The sensor has been used to measure the concentrations of propylene glycol solutions and sugar solutions, and it could detect 0.7% and 0.45% concentration changes for them with an optical spectrum analyser in resolution of 10pm.
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| 关 键 词： | 光纤布拉格光栅 温度不敏感性化学传感器 峰值波长 溶液浓度 |
| 收稿时间： | 2006-08-15 |
| 修稿时间： | 2006-08-15 |
Temperature-Insensitive Chemical Sensor with Twin Bragg Gratings in an Optical Fibre |
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| SANG Xin-Zhu,YU Chong-Xiu,YAN Bin-Bin,MA Jian-Xin,MENG Zhao-Fang,Mayteevarunyoo T.&sup,LU Nai-Guang.Temperature-Insensitive Chemical Sensor with Twin Bragg Gratings in an Optical Fibre[J].Chinese Physics Letters,2006,23(12):3202-3204. |
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| Authors: | SANG Xin-Zhu YU Chong-Xiu YAN Bin-Bin MA Jian-Xin MENG Zhao-Fang Mayteevarunyoo T&sup LU Nai-Guang |
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| Institution: | 1.Key Laboratory of Optical Communication and Lightwave Technologies, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876 ;2.Department of Telecommunication Engineering, Mahanakorn University of Technology, Bangkok 10530, Thailand;3.Department of Electronic Information Engineering, Beijing Institute of Machinery, Beijing 100085 |
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| Abstract: | To reduce temperature sensitivity of the fibre Bragg grating (FBG) chemical sensor, a simple method is proposed by measuring the peak wavelength difference between an etched FBG and an un-etched one in an optical fibre. Thermal characteristics and chemical sensitivity of the sensor are experimentally investigated. The experimental results indicate that the etched FBG and the rest one have almost the same thermal response, and concentration changes of the surrounding chemical solutions can be detected by measuring the peak wavelength difference between them. The sensor has been used to measure the concentrations of propylene glycol solutions and sugar solutions, and it could detect 0.7% and 0.45% concentration changes for them with an optical spectrum analyser in resolution of 10 pm. |
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| Keywords: | 07 07 Df 42 81 Pa 07 06 Vg |
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