摘要
实现了一种基于腰椎扩径熔接马赫-曾德尔(M-Z)干涉仪的温度光纤传感器。通过腰椎扩径熔接技术,分别对4.5cm长的单模光纤(SMF)两端进行扩径,构成球形-单模-球形结构的M-Z干涉仪。该干涉仪具有温度敏感特性,因外界环境温度的变化会引起光纤包层模的有效折射率发生变化,从而导致干涉光谱的变化。通过检测同一级次干涉谷的特征波长漂移,实现对温度的测量。实验结果表明,在温度变化范围为15~60℃时,干涉谱发生了明显的红移现象,传感器相应的温度灵敏度为0.068nm/℃。本文温度光纤传感器结构简单、成本低和灵敏度高,在温度检测方面具有良好的应用前景。
A temperature fiber sensor based on Ma ch-Zehnder （M-Z） interferometer with waist-enlarged fusion bitapers is propos ed.It′s enlarged at each end of a 4.5cm-long single mode fiber that achieves the M-Z interferometer by cascading two spherical-shaped single mode fibe r structures with the technology of waist-enlarged fusion.This interferometer has temperature-sensitive features,so the effective refractive index of the cladding mode changes with the external temper ature,and then the interference transmission spectra change accordingly.By observing the character istic wavelength shifts of the same interference dip order,temperature can be measured.Experimental results show that when the temperature changes from 15℃ to 60℃,the interference spectrum has an obvious red shift,and the relevant sensitivity of sensor is 0.068nm/℃.The temperature fiber sensor has many advan tages,including simple structure,low cost and high sensitivity.Therefore,it has great potential for mea surement of temperature.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2017年第12期1285-1289,共5页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(61405096
61504058
61775102)
人才引进研究和南京邮电大学研究基金(NY214158)资助项目
