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极大倾斜角度光纤光栅pH值传感器及其增敏研究

pH Sensor Based on Fiber Grating with Extremely Large Tilt Angle and Its Sensitivity Enhancement

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摘要

针对光纤光栅pH值传感器的响应灵敏度低、交叉敏感等问题, 提出了一种包覆pH值敏感型智能水凝胶的极大倾斜角度光纤光栅(Ex-TFG)pH值传感器。理论上研究了Ex-TFG pH值传感器的响应原理, 分析了影响传感器灵敏度的因素, 提出了提高测量灵敏度的方法。结合pH值敏感型智能水凝胶独特的响应特性设计和制作了传感器, 并进行了相应的实验研究。实验结果表明, 相对基于光纤布拉格光栅和长周期光纤光栅的pH传感器, 基于Ex-TFG的pH值传感器可有效提高对pH值的响应灵敏度(最大可达-0.718 nm/pH), 并且可以扩大pH值的检测范围。通过增加水凝胶的包覆厚度, 可增加pH值传感器的测量灵敏度。

Abstract

Aiming at the low response sensitivity and the cross sensitivity of fiber grating pH sensors, a pH sensor based on fiber grating with extremely large tilt angle (Ex-TFG) is proposed, and the sensor is coated with pH sensitive intelligent hydrogel. The responsive mechanism of the Ex-TFG pH sensor is studied theoretically, factors affecting the sensor sensitivity are analyzed, and a method to improve the measurement sensitivity is presented. Combined with the unique response performance of pH sensitive intelligent hydrogel, sensors are designed and fabricated, and corresponding experiments are conducted as well. The experimental results show that, compared with the pH sensors based on fiber Bragg grating and long period fiber grating, the pH sensor based on Ex-TFG can effectively improve the pH response sensitivity (with maximum of -0.718 nm/pH) and expand the pH detection range. The measurement sensitivity of the pH sensor can be enhanced when we increase the coating thickness of hydrogel.

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中图分类号:TN253

DOI:10.3788/aos201737.0106009

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61505017,51276209,61327004,61421002)、重庆市科委基础与前沿研究项目(cstc2014jcyjA0081)、重庆市教委科学技术研究项目 (KJ1400942)、重庆理工大学研究生创新基金(YCX2015221)

收稿日期:2016-08-17

修改稿日期:2016-09-08

网络出版日期:--

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罗彬彬:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
邹文根:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
赵明富:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
石胜辉:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
邹雪:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
汤斌:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
刘永:电子科技大学光电信息学院, 四川 成都 610054
周慧:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
李成成:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054
田霞:重庆理工大学重庆市光纤传感与光电检测重点实验室, 重庆 400054重庆理工大学电气与电子工程学院, 重庆 400054

联系人作者:罗彬彬(luobinbin@cqut.edu.cn)

备注:罗彬彬(1981—), 男, 博士, 副教授, 主要从事光纤传感技术方面的研究。

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引用该论文

Luo Binbin,Zou Wengen,Zhao Mingfu,Shi Shenghui,Zou Xue,Tang Bin,Liu Yong,Zhou Hui,Li Chengcheng,Tian Xia. pH Sensor Based on Fiber Grating with Extremely Large Tilt Angle and Its Sensitivity Enhancement[J]. Acta Optica Sinica, 2017, 37(1): 0106009

罗彬彬,邹文根,赵明富,石胜辉,邹雪,汤斌,刘永,周慧,李成成,田霞. 极大倾斜角度光纤光栅pH值传感器及其增敏研究[J]. 光学学报, 2017, 37(1): 0106009

被引情况

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【6】刘 婷,王文琪,刘志群,赵艳丽,易定容. CdSe/ZnS量子点在倏逝波光纤pH传感中的应用. 光谱学与光谱分析, 2018, 38(6): 1944-1948

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