High sensitivity Mach-Zehnder interferometer sensors based on concatenated ultra-abrupt tapers on thinned fibers

被引：33

作者：

Li, Benye ^{[1
]}

Jiang, Lan ^{[1
]}

Wang, Sumei ^{[1
]}

Yang, Jinpeng ^{[1
]}

Wang, Mengmeng ^{[1
]}

Chen, Qianghua ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2012年 / 44卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Mach-Zehnder interferometer; Refractive index sensor; Fiber taper; MICROFIBER;

D O I：

10.1016/j.optlastec.2011.09.013

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This study proposes a simple, cost-effective method to fabricate fiber-based Mach-Zehnder interferometer (MZI) sensors by concatenating two ultra-abrupt fiber tapers together using a fusion splicer. By concatenating, the taper diameter and length ratio is 1:1 that is much greater than that (1:10) by stretching. The refractive index sensitivity is comparable to the MZI sensors based on long-period fiber grating pairs or stretched fiber taper pairs. The MZI fiber claddings are etched to improve the sensitivity of refractive index measurements. The sensitivity is 664.57 nm/RIU (refractive index unit) for the refractive index ranging from 1.3348 to 1.3558, which is 2-6 times greater than those measured by long period fiber gratings (LPFGs) after sensitivity enhancement. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：640 / 645

页数：6

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