A new magnetic sensor with Mach-Zehnder/Sagnac optical fiber interferometer

被引：0
|
作者：
Li S. [1 ]
Li X. [1 ]
Wang X. [1 ]
Chen J. [1 ]
机构：
[1] State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai
来源：
Frontiers of Optoelectronics in China | 2009年 / 2卷 / 2期
基金：
中国国家自然科学基金;
关键词：
Mach-Zehnder/Sagnac optical fiber interferometer; magnetic field sensor; optical fiber sensor;
D O I：
10.1007/s12200-009-0038-4
中图分类号：
学科分类号：
摘要：
This paper presents a new structure for magnetic sensor with Mach-Zehnder/Sagnac optical fiber interferometer. The magnetostrictive optical fiber sensor is placed in one of the two arms of the Mach-Zehnder interferometer, which can detect the optic phase shift by testing the length difference of the arm caused by environmental magnetic field. Because of forward and backward transmission in the arms, the Mach-Zehnder/Sagnac optical fiber interferometer can deduce twice exactly of the phase shift proportional to the length difference as Mach-Zehnder interferometer. Theoretically, description of the Mach-Zehnder/Sagnac interferometer is given, and some main issues in the magnetic field sensor with optical fiber interferometer are demonstrated with experiments. The magnetic sensors are implemented using the proposed methods. © 2009 Higher Education Press and Springer-Verlag GmbH.
引用
收藏
页码：192 / 194
页数：2
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