| Active temperature compensation design of sensor with fiber gratings |
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| 作者姓名： | 董兴法 黄勇林 姜莉 开桂云 董孝义 |
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| 作者单位： | Institue of Modern Optics，Nankai University，Tianjin 300071 University of Science and Technology of Suzhou，Suzhou 215011，University of Science and Technology of Suzhou，Suzhou 215011，Institue of Modern Optics，Nankai University，Tianjin 300071，Institue of Modern Optics，Nankai University，Tianjin 300071，Institue of Modern Optics，Nankai University，Tianjin 300071 |
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| 基金项目： | This work was supported by the National 863 Project of China (No. 2002AA313110)，the project of National Construction Ministry (01-4-048) |
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| 摘 要： | A technique for compensation of temperature effects in fiber grating sensors is reported. For strain sensors and other sensors related to strain such as electromagnetic sensors, a novel structure is designed, which uses two fiber Bragg gratings (FBGs) as strain differential sensor and has temperature effects cancelled. Using this technique, the stress sensitivity has been amplified and gets up to 0.226 nm/N, the total variation in wavelength difference within the range of 3-45 °C is 0.03 nm, 1/14 of the uncompensated FBG. The structure can be used in the temperature-insensitive static strain measurement and minor-vibration measurement.
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