Mach-Zehnder interferometer based on core-cladding mode coupling in single mode fibers

doi:10.1007/s12200-010-0124-7

Front Optoelec Chin

2010, Vol. 3

Issue (4) : 364-369 https://doi.org/10.1007/s12200-010-0124-7

RESEARCH ARTICLE

Mach-Zehnder interferometer based on core-cladding mode coupling in single mode fibers

Yan LIU¹, Bo LIU¹(

), Hao ZHANG¹, Yinping MIAO²

1. Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China; 2. Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China

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Abstract

In this paper, a novel simple but effective method is presented to construct compact all-fiber Mach-Zehnder (M-Z) interferometer based on CO₂-laser-machined micro-notches in single mode fibers. Interference fringes are obtained, and temperature, force, and bending characteristics of the interferometer have been experimentally investigated. Such a compact fiber component with acceptable sensing performances makes it a good candidate for the measurement of numerous physical parameters.

Keywords Mach-Zehnder (M-Z) interferometer micro-notch optical fiber sensor single mode fiber

Corresponding Author(s): LIU Bo,Email:liubo@mail.nankai.edu.cn

Issue Date: 05 December 2010

Cite this article:

Yan LIU,Bo LIU,Hao ZHANG, et al. Mach-Zehnder interferometer based on core-cladding mode coupling in single mode fibers[J]. Front Optoelec Chin, 2010, 3(4): 364-369.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-010-0124-7
https://academic.hep.com.cn/foe/EN/Y2010/V3/I4/364

Fig.1 Schematic diagram of proposed M-Z interferometer

Fig.2 Measured wavelength spectra for different interference arm lengths. (a) =5 mm; (b) =20 mm; (c) =30 mm; (d) =40 mm

Fig.3 Peak wavelength shift as a function of temperature

Fig.4 Force characteristics in three different cases. (a) and (b) for lateral plane force; (c) and (d) for lateral point force; (e) and (f) for axial force (A peak around 718 nm is studied)

Fig.5 Spectra responds with bending radius decreases. (a) Bending in - plane; (b) bending in - plane

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