NDLI: Self-imaging in single mode-multimode-single mode optical fiber sensors

Content Provider	IEEE Xplore Digital Library
Author	Morshed, A.H.
Copyright Year	2011
Description	Author affiliation: Electronics and Communication Engineering Dept., Faculty of Engineering, Ain Shams University, Cairo, Egypt (Morshed, A.H.)
Abstract	Multimode interference in optical waveguides has interesting self-imaging properties, which have extensively been investigated and utilized in many integrated optical devices. Although these investigations started with most interest in step-index integrated waveguides, they have later included graded-index waveguides, where the dependence of the interference images on the refractive index grading of the waveguides was observed and utilized in the design and optimization of devices. Later on, multimode interference has also been explored in optical fibers in order to realize fiber devices, including sensors. A basic structure of these devices has been the Single mode — Multimode — Single mode (SMS) fiber section concatenation, where multimode interference in the multimode section leads to the formation of a self-image of the single mode fiber excitation onto the output single mode fiber core. This paper reports on the investigation of the self-imaging properties of these optical fiber structures and their possible use as sensors. Self-imaging in symmetrically excited multimode optical fibers is analytically studied, revealing the effect of refractive index grading on the characteristics of SMS fiber devices. The theoretical results are verified by numerical simulations using the beam propagation method. The experimental investigation of an SMS structure proposed as a bending sensor is then described and a discussion of the results obtained and possible application of the device is presented.
Starting Page	1
Ending Page	5
File Size	154566
Page Count	5
File Format	PDF
ISBN	9781457700682
e-ISBN	9781457700699
e-ISBN	9781457700675
DOI	10.1109/SIECPC.2011.5876965
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-24
Publisher Place	Saudi Arabia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber sensors Bending sensor Multimode interference Single mode-multimode-single mode fiber section concatenation Optical fiber sensor Interference Optical fiber communication Optical fiber theory Self-imaging
Content Type	Text
Resource Type	Article

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