光通信研究Issue(5)：58-61,4.DOI:10.13756/j.gtxyj.2016.05.017
基于单纤拉锥M-Z干涉仪的折射率传感器
A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer
摘要
Abstract
In this paper,we cascade two symmetrical slow tapers in a single-mode fiber and remove the coating between two ta-pers,which achieve a Mach-Zehnder(M-Z)interferometer.The cladding is act as a sensing arm,which is sensitive to the re-fractive index in the outside world.Through the analysis of the optical field evolution of taper region,mode field radius will reach maximum value of 14.8 mm when fiber taper has a radius of 25 mm.When taper waist radius is 12.5 mm,transition re-gion is 5 mm,and taper region interval is 1 3 1 mm,the effect of coupling and waving is best.The sensing arm can detect alco-hol concentration in the range of 0~100%,which has a good linear relationship between refractive index and wavelength offset with detection sensitivity of -120 nm/RIU.The sensor has advantages of low insertion loss,stable performance and strong anti-interference capacity,which can be applied to areas such as distillery and water quality monitoring.关键词
光纤光学/干涉仪/对称缓锥/传感器/折射率Key words
fiber optics/interferometer/symmetrical slow taper/sensor/refractive index分类
信息技术与安全科学引用本文复制引用
丁祥霞,董兴法,吕正兵,姜莉,吴婧..基于单纤拉锥M-Z干涉仪的折射率传感器[J].光通信研究,2016,(5):58-61,4.基金项目
江苏省青蓝工程中青年学术带头人项目资助(2010-101) （2010-101）
江苏省企业研究生工作站资助项目(2012-0819) （2012-0819）
