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Coupling of modes in bent biconically tapered single-mode fibers
Journal article   Peer reviewed

Coupling of modes in bent biconically tapered single-mode fibers

P.M Shankar, L.C Bobb and H.D Krumboltz
Journal of lightwave technology, v 9(7), pp 832-837
Jul 1991

Abstract

Fluctuations Heating Helium Optical coupling Optical fiber couplers Optical fiber sensors Optical fiber theory Optical sensors Tellurium Throughput
Biconically tapered single-mode fibers are fabricated by heating a single-mode fiber while applying tension. As a result of this tapering, cladding modes are excited in the tapered region of the fiber where the V parameter of the fiber goes down below 1.0. These cladding modes couple to one another, leading to fluctuations of the optical throughput. Since the index difference between the cladding and the external medium is rather high ( approximately 0.5), the cladding modes will be of the exact type, namely, TE, TM, HE, and EH modes. The coupling of these modes in the tapered region is analyzed using the exact mode formalism when the tapered region is bent. The theoretical results agree very well with experimental results obtained on bent tapers which show strong fluctuations of the optical power as a function of the bending angle.< >

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Electrical & Electronic
Optics
Telecommunications
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