Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 32,
  • Issue 9,
  • pp. 1734-1740
  • (2014)

Refractive Index Sensing Characteristics of Single-Mode Fiber-Based Modal Interferometers

Not Accessible

Your library or personal account may give you access

Abstract

We present a theoretical and experimental investigation on refractive index (RI) sensing characteristics of single mode fiber (SMF) based modal interferometers. Theoretical analysis reveals that interference between different modes in an SMF has a quite different response to the RI variation of the external medium. The interference between the core and lower order cladding modes has negative RI sensitivity whereas that between the core and higher order modes, or between two different order cladding modes have positive sensitivity. A single-mode-multimode-single-mode (SMS) fiber Michelson interferometer with a large-core step-index multimode fiber (MMF) is employed for experimental verification. In the SMS-based Michelson interferometer, the MMF acts as a mode coupler to excite cladding modes in the SMF. The RI response of the SMS-based structures with two different lengths of MMF are respectively tested in sodium-chloride water solutions. Experimental results show excellent agreements with the theoretical analysis.

© 2014 IEEE

PDF Article
More Like This
Refractive index sensing based on Mach–Zehnder interferometer formed by three cascaded single-mode fiber tapers

Di Wu, Tao Zhu, Ming Deng, De-Wen Duan, Lei-Lei Shi, Jun Yao, and Yun-Jiang Rao
Appl. Opt. 50(11) 1548-1553 (2011)

In-fiber Mach-Zehnder interferometer with piecewise interference spectrum based on hole-assisted dual-core fiber for refractive index sensing

J. Yang, M. Yang, C. Y. Guan, J. H. Shi, Z. Zhu, P. Li, P. F. Wang, J. Yang, and L. B. Yuan
Opt. Express 26(15) 19091-19099 (2018)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved