Current sensor based on inline microfiber Mach-Zehnder interferometer

被引：23

作者：

Jasim, A. A. ^{[1
]}

Harun, S. W. ^{[1
,2
]}

Muhammad, M. Z. ^{[1
]}

Arof, H. ^{[1
]}

Ahmad, H. ^{[2
]}

机构：

[1] Univ Malaya, Dept Elect Engn, Fac Engn, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Photon Res Ctr, Kuala Lumpur 50603, Malaysia

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2013年 / 192卷

关键词：

Microfiber; Flame brushing technique; In line Mach-Zehnder interferometer; Current sensor;

D O I：

10.1016/j.sna.2012.12.012

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 compact inline microfiber Mach-Zehnder interferometer (MMZI) is proposed for current sensor application. The MMZI is fabricated using flame-brushing technique where both transition parts of a microfiber are tapered to reduce the waist diameter and form an interference region. The fabricated MMZI shows a good interference fringes with a high extinction ratio of 15 dB. The fringe spacing can be tuned from 3.95 nm to 3.36 nm as the length of the interference region is varied from 4.5 mm to 6 mm. The shift in the interference fringes is observed to be linearly proportional to the square of the amount of the flowing current and the slope efficiency of the sensor is obtained at 140.26 pm/A(2) with a correlation coefficient of 0.99. Since the refractive index of the fiber core has a different temperature coefficient than that of air, the interferometer can be used as a current sensor by placing the current carrying wire in contact with the waist region of the second part of the tapered fiber. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：9 / 12

页数：4

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