Temperature characteristic of in-fiber Mach-Zehnder interferometer using twin-core fiber

FAN Lin-yong; JIANG Wei-wei; ZHAO Rui-feng; PEI Li; JIAN Shui-sheng

doi:10.3788/OPE.20111901.0001

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Temperature characteristic of in-fiber Mach-Zehnder interferometer using twin-core fiber

Article | 更新时间：2020-08-12

- Temperature characteristic of in-fiber Mach-Zehnder interferometer using twin-core fiber
- Optics and Precision Engineering Vol. 19, Issue 1, Pages: 1-9(2011)
- 作者机构：
  
  北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室北京,100044
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111901.0001
  CLC： TN253
- Received：03 February 2010，
  
  Revised：24 May 2010，
  
  Published Online：22 January 2011，
  
  Published：22 January 2011
- 稿件说明：
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范林勇, 江微微, 赵瑞峰, 裴丽, 简水生. 双芯光纤马赫-曾德尔干涉仪的温度特性[J]. 光学精密工程, 2010,19(1): 1-9

FAN Lin-yong, JIANG Wei-wei, ZHAO Rui-feng, PEI Li, JIAN Shui-sheng. Temperature characteristic of in-fiber Mach-Zehnder interferometer using twin-core fiber[J]. Editorial Office of Optics and Precision Engineering, 2010,19(1): 1-9
范林勇, 江微微, 赵瑞峰, 裴丽, 简水生. 双芯光纤马赫-曾德尔干涉仪的温度特性[J]. 光学精密工程, 2010,19(1): 1-9 DOI： 10.3788/OPE.20111901.0001.

FAN Lin-yong, JIANG Wei-wei, ZHAO Rui-feng, PEI Li, JIAN Shui-sheng. Temperature characteristic of in-fiber Mach-Zehnder interferometer using twin-core fiber[J]. Editorial Office of Optics and Precision Engineering, 2010,19(1): 1-9 DOI： 10.3788/OPE.20111901.0001.

摘要

对适用于温度传感的双芯光纤马赫-曾德尔干涉仪进行了研究

并通过将一根单模双芯光纤熔接在两根单模光纤之间

制得了双芯光纤马赫-曾德尔干涉仪型梳状滤波器。用干涉原理分别分析了该器件传输谱的自由空间谱宽与波长、双芯光纤的长度和两纤芯间的有效折射率差的关系

实验检测了它的温度特性。结果显示

随着温度的升高

该器件的传输谱发生红移。在相同温差下

不同波长处的波长漂移值不同

短波长处波长漂移较小

长波长处波长漂移较大。在固定波长处

该器件的传输谱的波长漂移实验数据与温度变化具有较好的二次曲线关系。该器件的温度灵敏度和波长有关

不同波长处灵敏度不同;固定波长处

灵敏度与温度成正比。另外

通过对单模光纤与双芯光纤熔接处的拉锥处理

可以有效降低所制器件的插入损耗。实验制得了插入损耗约为7 dB的梳状滤波器

其体积小、制作容易、与光纤系统具有良好的匹配性

可应用于光纤温度传感。

Abstract

A Mach-Zehnder interferometer using a Twin-core Fiber(TCF) was researched for temperature sensing and a comb-filter based on the in-fiber Mach-Zehnder Interferometer (MZI) was fabricated by splicing a section of single mode TCF between two single mode fibers (SMFs). The Free Spectral Range(FSR) of the transmission spectrum for the device versa the wavelength

the length of TCF and the effective index difference between the two cores were analyzed and the temperature characteristic of the device was experimentally tested.The tested results indicate that the transmission spectrum of the device has a red shift and a quadratic curve with the temperature increasing. Under the same temperature difference

the wavelength shifts are different at different wavelengths and the wavelength shift at short wavelength is smaller than that at longer wavelength. The sensitivity of the device is different at different wavelengths

and it is proportional to the temperature at a fixed wavelength. Furthermore

the insertion loss of the device is decreased effectively by tapering the splicing regions between SMFs and TCF.Finally a device with insertion loss about 7 dB was implemented. This device is relatively small

simple

compatible and suitable for fiber optic temperature sensors.

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Keywords

references

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