| Temperature Compensation for Double Fiber Bragg Grating Sensors |
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| 作者姓名： | WANG Chun-cheng LIU Jia ZHENG Jian-bang |
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| 作者单位： | [1]Department of Physics and Electrical Engineering, College of Yulin, Yulin 719000, CHN [2]Laboratory of Optical Information Technology, School of Sciences, Northwestern Polytechnical University, Xi＇an 710072, CHN |
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| 摘 要： | A novel double fiber Bragg grating(FBG) strain sensor configuration is presented. Temperature compensation method is based on double FBG moored on a rhombus frame. Through the theoretical analysis,the relation between relative shift of Bragg wavelength and the strain applied on the sensor is obtained,and the analytical expression of strain sensitivity coefficient is also given. The experiment results show that:in the strain range of 0～0.8 mm,the relation between the relative shift of Bragg wavelength and applied strain is linear,and the dispersion of double FBG wavelength at the range of -25 ℃～60 ℃ is 0～0.002 nm. The strain sensitivity of the displacement sensor configuration is 0.171 nm/με,and is nearly twice than that of single FC sensor.
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| 关 键 词： | 光纤器件 光栅 温度补偿 光学传感器 |
| 文章编号： | 1007-0206（2006）03-0153-05 |
| 收稿时间： | 2006-04-22 |
| 修稿时间： | 2006-04-27 |
Temperature Compensation for Double Fiber Bragg Grating Sensors |
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| WANG Chun-cheng LIU Jia ZHENG Jian-bang.Temperature Compensation for Double Fiber Bragg Grating Sensors[J].Semiconductor Photonics and Technology,2006,12(3):153-157. |
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| Authors: | WANG Chun-cheng LIU Jia ZHENG Jian-bang |
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| Abstract: | A novel double fiber Bragg grating(FBG) strain sensor configuration is presented. Temperature compensation method is based on double FBG moored on a rhombus frame. Through the theoretical analysis, the relation between relative shift of Bragg wavelength and the strain applied on the sensor is obtained, and the analytical expression of strain sensitivity coefficient is also given. The experiment results show that: in the strain range of 0~0.8 mm, the relation between the relative shift of Bragg wavelength and applied strain is linear, and the dispersion of double FBG wavelength at the range of -25℃~60℃is 0~0.002 nm. The strain sensitivity of the displacement sensor configuration is 0·171 nm/με, and is nearly twice than that of single FBG sensor. |
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| Keywords: | Temperature compensation Fiber Bragg grating Sensitivity |
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