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基于氧化石墨修饰长周期光纤光栅的传感特性

Sensing characteristics of long period fiber grating functionalized with graphite oxide

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摘要

提出一种基于氧化石墨烯(GO)修饰的长周期光纤光栅(LPFG)传感器。利用氢氧化钠溶液对LPFG表面进行羟基化处理, 采用氢键结合的方式使GO固定在光栅表面, 形成基于GO修饰的LPFG传感器。实验研究了GO-LPFG对外部折射率及温度的响应特性, 结果表明: 该GO-LPFG的平均折射率灵敏度较未涂覆GO的LPFG提高1.09倍, 温度灵敏度略有降低。随着光栅直径的减小, GO-LPFG的平均折射率灵敏度进一步提高。当光栅直径为108 μm时, 在折射率1.333~1.448内的平均波长和耦合强度折射率灵敏度分别约为38.99 nm/RIU和57.33 dB/RIU, 与未采用GO修饰直径为108 μm的LPFG及直径为125 μm的GO-LPFG相比, 其平均波长和耦合强度折射率灵敏度分别提高1.45, 2.17, 3.80和3.42倍。该GO-LPFG传感器在各种大分子量的病毒抗原蛋白、生物病菌等生物检测领域具有潜在的应用价值。

Abstract

A graphene oxide-functionalized long period fiber grating (GO-LPFG)-based fiber optic sensor is proposed. The surface of the LPFG was hydroxylated by sodium hydroxide solution, and GO was fixed on the grating surface by hydrogen bonding to form a GO modification LPFG sensor. The responses of the GO-LPFG to external refractive index and temperature were studied experimentally. The experimental results show that the average refractive index sensitivity of the GO-LPFG is 1.09 times higher than that of uncoated LPFG, and the temperature sensitivity slightly declines. With the decrease of grating diameter, the average refractive index sensitivity of GO-LPFG was further improved. The average wavelength and coupling intensity refractive index sensitivities of the GO-LPFG with a diameter of 108 μm in the refractive index range of 1.333-1.448 are ~38.99 nm/RIU and ~57.33 dB/RIU, respectively. These increased by 1.45, 2.17 and 3.80, 3.42 times, respectively, compared with those of bare LPFG and GO-LPFG with diameter of 125 μm. The proposed GO-LPFG sensor has potential applications in detecting various viral antigen proteins with high molecular weight and biological pathogens in biofields.

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中图分类号:TN253

DOI:10.3788/ope.20192711.2305

所属栏目:现代应用光学

基金项目:国家自然科学基金资助项目(No. 61875026, No.61505017); 重庆市科委前沿与基础项目(No.cstc2019jcyj-msxmX0093,No.cstc2018jcyjAX0122); 重庆市教育委员会科学技术研究项目(No.KJQN201801121);重庆理工大学研究生创新基金资助项目(No. yjs2018235,No. ycx20192048, No.ycx20192049)

收稿日期:2019-05-16

修改稿日期:2019-06-26

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石胜辉:重庆理工大学 光纤传感与光电检测重庆市重点实验室, 重庆 400054重庆理工大学 智能光纤感知技术重庆市高校工程研究中心, 重庆 400054
王 鑫:重庆理工大学 光纤传感与光电检测重庆市重点实验室, 重庆 400054
赵明富:重庆理工大学 光纤传感与光电检测重庆市重点实验室, 重庆 400054重庆理工大学 智能光纤感知技术重庆市高校工程研究中心, 重庆 400054
吴德操:重庆理工大学 光纤传感与光电检测重庆市重点实验室, 重庆 400054重庆理工大学 智能光纤感知技术重庆市高校工程研究中心, 重庆 400054
罗彬彬:重庆理工大学 光纤传感与光电检测重庆市重点实验室, 重庆 400054重庆理工大学 智能光纤感知技术重庆市高校工程研究中心, 重庆 400054

联系人作者:石胜辉(shshill@cqut.edu.cn)

备注:石胜辉(1980-), 男, 重庆人, 博士, 讲师, 2005年于长春理工大学获得学士学位, 2008年于昆明理工大学获得硕士学位, 2013年于电子科技大学获得博士学位, 主要从事光纤光栅传感技术方面的研究。

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引用该论文

SHI Sheng-hui,WANG Xin,ZHAO Ming-fu,WU De-cao,LUO Bin-bin. Sensing characteristics of long period fiber grating functionalized with graphite oxide[J]. Optics and Precision Engineering, 2019, 27(11): 2305-2314

石胜辉,王 鑫,赵明富,吴德操,罗彬彬. 基于氧化石墨修饰长周期光纤光栅的传感特性[J]. 光学 精密工程, 2019, 27(11): 2305-2314

被引情况

【1】石胜辉,吴德操,王鑫,聂青林,刘志江,罗彬彬,刘恩华,柳鹏,赵明富. 氧化石墨烯包覆金纳米壳修饰长周期光栅的免疫传感器. 光学学报, 2020, 40(18): 1806001--1

【2】严学文,任立勇,杨利,冉东升,韩冬冬,王勇凯,梁磊,许程访,刘继红,董军,任凯利. 基于高精度微锥型长周期光纤光栅的宽带滤波器. 激光与光电子学进展, 2020, 57(19): 190605--1

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