Investigation on Single-Mode-Multimode- Single-Mode Fiber Structure

• Published in: Journal of lightwave technology Vol. 26; no. 5; pp. 512 - 519
• Main Authors: Qian Wang, Farrell, G., Wei Yan
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Approximation; Band pass filters; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber optics; Fibers; Integrated optics. Optical fibers and wave guides; Interference; Mapping; Mathematical models; multimode interference; Optical and optoelectronic circuits; Optical fiber communication; Optical fiber devices; Optical fiber sensors; Optical fibers; Optical propagation; Optical refraction; Optical sensors; Optical waveguides; Spectral response; Symmetry; Wave propagation; Wavelengths; Spectral response; Multimode fibers; Accuracy; Single mode fiber; Light propagation; Guided wave; Mapping; multimode interference; Circular waveguide; Fiber optics
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2007.915205

This paper presents an investigation on a single-mode-multimode-single-mode fiber structure. A one-way guided-mode propagation analysis for the circular symmetry waveguide is employed to model the light propagation and the approximated formulations are derived and evaluated concerning the accuracy. Phase conjunction of the multimode interference within the fiber structure is revealed. A simple way to predict and analyze the spectral response of the structure is presented through the space to wavelength mapping with the derived approximated formulations. The prediction of spectral response is verified numerically and experimentally.