| 一种基于LPFG高灵敏度浓度传感器 |
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| 引用本文： | 赵洪霞,丁志群,王金霞,鲍吉龙.一种基于LPFG高灵敏度浓度传感器[J].光电子．激光,2009(6). |
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| 作者姓名： | 赵洪霞 丁志群 王金霞 鲍吉龙 |
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| 作者单位： | 宁波工程学院电子与信息工程学院; |
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| 基金项目： | 浙江省自然科学基金资助项目(X106864);;宁波市自然科学基金资助项目(2007A610016) |
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| 摘 要： | 利用Sagnac光纤环全反射的特性和单根长周期光纤光栅(LPFG)构成Michelson干涉仪,入射光经LPFG后,部分被耦合到包层中传输,经过包层和纤芯传输的光信号经Sagnac光纤环全反射后重新耦合回LPFG,在光栅区域干涉。利用传输矩阵理论分析了干涉结构的光谱特性。用此干涉结构检测了蔗糖溶液浓度,传感灵敏度可达0.065 nmLg-1。
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| 关 键 词： | 传感技术 长周期光纤光栅（LPFG） Sagnac光纤环 干涉仪 浓度传感 |
A higher sensitively concentration sensor using long-period fiber grating |
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| ZHAO Hong-xi,DING Zhi-qun,WANG Jin-xi,BAO Ji-long.A higher sensitively concentration sensor using long-period fiber grating[J].Journal of Optoelectronics·laser,2009(6). |
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| Authors: | ZHAO Hong-xi DING Zhi-qun WANG Jin-xi BAO Ji-long |
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| Affiliation: | College of Electronic and Information Engineering;Ningbo University of Technology;Ningbo 315016;China |
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| Abstract: | A Michelson interferometer based on fiber ring and a LPFG is presented.The input signal is partly coupled into the cladding of the fiber by LPFG,both of the transmitted optical signals in the core and cladding are reflected by sagnac fiber ring and coupled simultaneously back to the LPFG and interfere.Spectrum characteristics are analyzed using transfer matrix method.The proposed device is experimented to serve a sucrose concentration sensor,whose sensitivity is measured to be 0.065 nmLg-1. |
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| Keywords: | sensor technique long-period fiber grating(LPFG) Sagnac fiber ring interferometer concentration sensing |
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