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Coupling coefficients evaluation of a directional coupler using gain guided and index antiguided fibers
Authors:Xiangru Wang  Caidong Xiong  Juanyan Luo
Affiliation:The School of Physical Electronics, University of Electronic Science and Technology of China, Sichuan 610054, China
Abstract:
In this paper, we have investigated the mutual and self coupling characteristics of directional couplers using two individual gain guided and index antiguided fibers, which can deliver robust single mode operation with large mode area, respectively owing to the combined adequately large gain coefficients in the core; Some interesting and distinguishing properties from conventional index guided fiber couplers are obtained that: The variations of coupling coefficients are complex-valued and spatially damping oscillated, but not exponential-like decreasing as conventional index guided couplers.
Keywords:Gain guided   Index antiguided   Ultra-large mode area   Single mode fiber   Directional coupler   Coupling coefficient   Coupled mode theory
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