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Weakly-Guiding Mode-Selective Fiber Couplers

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2 Author(s)
Riesen, N. ; Res. Sch. of Phys. & Eng., Australian Nat. Univ., Acton, SA, Australia ; Love, J.D.

This paper presents analytical descriptions of the behavior of weakly-guiding/weakly-coupled mode-selective fiber couplers, based on coupled-mode theory. Mode-selective couplers rely on the phase-matching of a higher-order mode in one fiber with the fundamental mode of a second, closely-positioned fiber. Their behavior is shown to be highly-dependent on the principle and azimuthal mode numbers of the higher-order mode, as well as its spatial-orientation. Zero coupling is shown to be possible for an asymmetric higher-order mode even when there is perfect phase-matching. The theory is also numerically simulated, and could assist in the future design of efficient mode-selective couplers for a wide range of optical communications and sensor systems.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:48 ,  Issue: 7 )

Date of Publication:

July 2012

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