Twin-core fiber SPR sensor with cone angle structure

LIU Pei-kun; LI Yan; WEI Yong; ZHANG Yu; LIU Chun-lan

doi:10.3788/OPE.20152313.0204

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Twin-core fiber SPR sensor with cone angle structure

更新时间：2020-08-13

- Twin-core fiber SPR sensor with cone angle structure
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 205-209(2015)
- 作者机构：
  
  哈尔滨工程大学理学院
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0204
  CLC： TN253
- Received：08 June 2015，
  
  Revised：30 June 2015，
  
  Published：14 November 2015
- 稿件说明：
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刘佩坤, 李彦, 魏勇等. 反射式双芯光纤锥角结构表面等离子体共振传感器[J]. 光学精密工程, 2015,23(10z): 205-209

LIU Pei-kun, LI Yan, WEI Yong etc. Twin-core fiber SPR sensor with cone angle structure[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 205-209
刘佩坤, 李彦, 魏勇等. 反射式双芯光纤锥角结构表面等离子体共振传感器[J]. 光学精密工程, 2015,23(10z): 205-209 DOI： 10.3788/OPE.20152313.0204.

LIU Pei-kun, LI Yan, WEI Yong etc. Twin-core fiber SPR sensor with cone angle structure[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 205-209 DOI： 10.3788/OPE.20152313.0204.

摘要

提出了一种使用双芯光纤的反射式新型表面等离子体共振(SPR)光纤微传感器。该SPR微传感器是通过研磨技术将双芯光纤研磨成锥角结构并在锥角端面和斜面分别镀制50 nm金膜和500 nm金反射膜制备的。将单模光纤侧面抛磨后与双芯光纤的一纤芯对芯并焊接

实现给双芯光纤的一纤芯注光;用110 m芯径的阶跃多模光纤与双芯光纤的另一纤芯焊接

实现接收SPR探针反射至另一纤芯中的SPR反射光谱。实验结果表明:双芯光纤锥角结构SPR探针的共振谷波长可对SPR探针接触到的折射率1.333～1.385的液体做出响应

平均灵敏度达4 769 nm/RIU。与传统光纤SPR传感器相比

使用的双芯光纤直径仅有125 m

可复合在5号针头中插入血管进行在线生物监测。该纤芯直径为8 m

光纤中模式较少

灵敏度高。该传感器可通过改变研磨角度移动共振谷工作范围

改变反应灵敏度

具有较大的应用潜力。

Abstract

A novel Surface Plasmon Resonance (SPR) sensor was developed based on the twin-core fiber. The fiber grinding technology was employed to fabricate the sensor probe. The twin-core fiber was grinded into a incline plane shape (building the taper angle structure) and was plated the 50 nm thickness gold film on the end surface and 300 nm thickness gold film on the side surface of the fiber. A normal single mode fiber was used to launch the light source power into one core of the twin-core fiber

and a multimode fiber with a core diameter of 110 m was emplogyed to receive the SPR reflected spectrum. The experiment shows that the SPR sensor based on the twin-core fiber can measure the refractive index of 1.333-1.385

and the testing average sensitivity is 4 769 nm/RIU. As compared with the traditional optical fiber SPR sensor

the novel SPR sensor based on the twin-core fiber has the diameter of 125 m

which is convenient to integrate in a 5# Syringe needle to monitor bio-information in vivo. The diameter of the fiber core is 8 m

therefore the beam mode is few

which helps to improve the sensitivity. Besides that

The working range can be moved by changing the fiber grinding angle

and sensitivity can be improved

so the sensor has a great potential applications.

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Keywords

references

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Related Author

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Related Institution

Institute of Modern Optics, College of Information Technical Science, Nankai University2. Nankai University Affiliated Hospital

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