Effect of MMF stub on the sensitivity of a photonic crystal fiber interferometer sensor at 1550 nm

被引：28
作者：
Dhara, P. [1 ]
Singh, Vinod K. [1 ]
机构：
[1] Indian Sch Mines, Dept Appl Phys, Dhanbad 826004, Bihar, India
来源：
OPTICAL FIBER TECHNOLOGY | 2015年 / 21卷
关键词：
Photonic crystal fiber; Mach-Zehnder interferometer; Fusion splicing of PCF; Fiber optics sensor; Finite element method; TEMPERATURE; STRAIN;
D O I：
10.1016/j.yofte.2014.11.008
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A simple photonic crystal fiber (PCF) based Mach-Zehnder interferometric sensor is reported for sensing the refractive index and level of liquid. The sensing head is formed by all-fiber in-line single mode-multi mode-photonic crystal-single mode fiber structure using the fusion splicing method. The interferometric pattern, observed in the PCF interferometer using monochromatic source and temperature sensing arrangement, is novel and reported for the first time to the best of our knowledge. The refractive index sensitivity of the interferometric device is increased by using multimode fiber. The output intensity at the end of lead-out single mode fiber decreases with increase in refractive index of surrounding. The index sensitivities of the interferometric devices are 440.32 mu w/RIU, 267.48 mu w/RIU and 195.36 mu w/RIU with sensing length 2.10 cm, 5.50 cm and 7.20 cm respectively. A 7.20 cm longed PCF sensor exhibits liquid level sensitivities -1.032 mu w/cm, -1.197 mu w/cm, and -1.489 mu w/cm for three different liquid respectively. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码：154 / 159
页数：6
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