Sensing Characteristics of Long Period Fiber Grating Functionalized with Graphite Oxide

SHI Sheng-hui; WANG Xin; ZHAO Ming-fu; WU De-cao; LUO Bin-bin

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Sensing Characteristics of Long Period Fiber Grating Functionalized with Graphite Oxide

更新时间：2020-08-13

- Sensing Characteristics of Long Period Fiber Grating Functionalized with Graphite Oxide
- Optics and Precision Engineering Vol. 27, Issue 11, Pages: 2305-2314(2019)
- 作者机构：
  
  1. 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
  2. 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
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China;the Foundation and cutting-edge Research Projects ofChongqing Science and Technology Commission;Scientific andTechnologicalResearchProgram of Chongqing MunicipalEducation Commission;GraduateStudent Innovation Program of Chongqing University of Technology
- DOI：
  CLC： TN253
- Received：16 May 2019，
  
  Revised：26 June 2019，
  
  Published Online：15 November 2019，
  
  Published：15 November 2019
- 稿件说明：
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石胜辉王鑫赵明富吴德操罗彬彬,. 基于氧化石墨烯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

SHI Sheng-hui, WANG Xin, ZHAO Ming-fu etc. Sensing Characteristics of Long Period Fiber Grating Functionalized with Graphite Oxide[J]. Editorial Office of Optics and Precision Engineering, 2019,27(11): 2305-2314
石胜辉王鑫赵明富吴德操罗彬彬,. 基于氧化石墨烯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 DOI：

SHI Sheng-hui, WANG Xin, ZHAO Ming-fu etc. Sensing Characteristics of Long Period Fiber Grating Functionalized with Graphite Oxide[J]. Editorial Office of Optics and Precision Engineering, 2019,27(11): 2305-2314 DOI：

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GO-LPFG对外部折射率及温度变化的响应特性，结果表明：该GO-LPFG平均折射率灵敏度较未涂覆GO的LPFG提高1.1倍，温度灵敏度略有降低。随着光栅直径减小，GO-LPFG的平均折射率灵敏度进一步提高，当光栅直径为108 m时，在折射率范围1.333-1.448内的平均波长和耦合强度折射率灵敏度分别为~38.99 nm/RIU和~57.33 dB/RIU，与未采用GO修饰直径为108 m的LPFG及直径为125 m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传感器在生物、医学、食品安全和环境监测等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 m 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 m. 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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Related Author

Sheng-hui SHI

Xin WANG

Ming-fu ZHAO

De-cao WU

Bin-bin LUO

Hong GU

Qing-ming LÜ

Related Institution

Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Intelligent Optical Fiber Sensing Technology, Chongqing University of Technology

Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection, Chongqing University of Technology

Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection， Chongqing University of Technology

School of Pharmacy and Bioengineering， Chongqing University of Technology

School of Mechatronics and Vehicle Engineering， Chongqing Jiaotong University

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