Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics

WAN Jiale; YANG Yan; LIU Shengnan; PAN Jiuqing; SHI Huixuan

doi:10.13756/j.gtxyj.2025.250144

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Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics

更新时间：2025-10-15

- Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics
- Study on Optical Communications Issue 5, (2025)
- 作者机构：
  
  1.国网电力科学研究院武汉南瑞有限责任公司，武汉　430206
  2.国网电力科学研究院有限公司，南京　211100
  3.国网青海省电力公司，西宁　810000
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.250144
  CLC： TN929.11
- Received：15 April 2025，
  
  Revised：2025-04-28，
  
  Published：10 October 2025
- 稿件说明：
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万家乐，杨艳，刘胜男，等. 感温触头光纤引线封装优化及其响应特性表征[J]. 光通信研究，2025(5): 250144.

Wan J L, Yang Y, Liu S N, et al. Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics[J]. Study on Optical Communications, 2025(5): 250144.
万家乐，杨艳，刘胜男，等. 感温触头光纤引线封装优化及其响应特性表征[J]. 光通信研究，2025(5): 250144. DOI： 10.13756/j.gtxyj.2025.250144.

Wan J L, Yang Y, Liu S N, et al. Optimization of Temperature-sensitive Contact Optical Fiber Lead Packaging and Characterization of Its Response Characteristics[J]. Study on Optical Communications, 2025(5): 250144. DOI： 10.13756/j.gtxyj.2025.250144.

摘要

【目的】

光纤传感器有着尺寸小、重量轻和抗电磁干扰等优点，在电力系统中应用广泛。文章针对电流互感器检定装置可动触头的温度检测需求，提出了一种光纤引线封装设计及其理论模型和光纤布拉格光栅（FBG）温度传感器。

【方法】

文章通过毛细铜管封装光纤串上的一对FBG，实现单传感器对两个触头的温度测量。设计了螺旋线-直线-螺旋线的结构封装光纤引线，在满足检定装置触头在工作时的位移的同时减小了光纤的弯曲损耗。利用ANSYS有限元分析软件对封装后的光纤引线变形进行了仿真分析，并建立了螺旋线光纤弯曲损耗数学模型，利用模型计算对不同高度下的螺旋线结构进行了设计优化。同时搭建了弯曲损耗实验平台对折射率突变型单模光纤在不同弯曲半径下的强度损耗进行了标定；搭建了温度实验平台对传感器的温度特性进行了测试验证。

【结果】

实验结果表明，当触头工作位移10 mm时，理论计算得到该光纤封装结构的弯曲损耗为0.066 d

B，与实验测量值误差为3.1%，该封装结构的弯曲损耗小。使用毛细铜管封装后，两FBG在0~100 ℃的温度灵敏度分别为12.50和12.26 pm/℃；曲率半径的平方

分别为99.97%和99.96%，线性度良好；两FBG的温度响应速度分别为0.84和0.82 s，响应速度快。

【结论】

文章提出了一种用于可动触点的光纤封装结构及其数学模型，该结构为光纤传感器在复杂电磁环境中的温度测量提供了新的布设方案。

Abstract

【Objective】

Optical fiber sensors

featuring compact size

lightweight design

and electromagnetic interference immunity

show significant potential in power system applications. To meet the temperature-monitoring requirement for the movable contacts of a current-transformer calibration device

the paper proposes a fiber-lead encapsulation design

its theoretical model

and a Fiber Bragg Grating (FBG) temperature sensor.

【Methods】

A paired FBG configuration is implemented using capillary copper tube encapsulation

enabling single-sensor dual-contact temperature measurement. A helix-straight-helix structural encapsulation is designed for fiber leads to accommodate contact displacement (up to 10 mm) while minimizing the bending losses. AN-SYS finite-element software is employed to simulate the deformation of the encapsulated fiber

and a mathematical model of bending loss in the spiral section is established to optimize the spiral geometry at different heights. A bending-loss testbed is built to calibrate the intensity loss of step-index single-mode fiber under various bend radii

and a temperature testbed is constructed to characterize the sensor's thermal response.

【Results】

At 10 mm contact displacement

the theoretical bending loss of 0.066 dB show a 3.1% deviation from experimental measurements

confirming the low-loss performance. The capillary-encapsulated FB-Gs demonstrate temperature sensitivities of 12.50 and 12.26 pm/℃within 0~100 ℃

with

values of 99.97% and 99.96%

respectively

indicating excellent linearity. Rapid response times of 0.84 and 0.82 s are

achieved.

【Conclusion】

A novel fiber encapsulation structure and its mathematical model are developed

providing an innovative deployment solution for temperature sensing in complex electromagnetic environments. This design enhances the practicality of FBG sensors in high-voltage electrical equipment monitoring.

关键词

Keywords

references

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Related Institution

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