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Nonlinear soliton matching between optical fibers
Authors:Agger Christian  Sørensen Simon T  Thomsen Carsten L  Keiding Søren R  Bang Ole
Institution:DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. cagg@fotonik.dtu.dk
Abstract:In this Letter, we propose a generic nonlinear coupling coefficient, η(NL)2=η|γ/β?|(fiber2)/|γ/β?|(fiber1), which gives a quantitative measure for the efficiency of nonlinear matching of optical fibers by describing how a fundamental soliton couples from one fiber into another. Specifically, we use η(NL) to demonstrate a significant soliton self-frequency shift of a fundamental soliton, and we show that nonlinear matching can take precedence over linear mode matching. The nonlinear coupling coefficient depends on both the dispersion (β?) and nonlinearity (γ), as well as on the power coupling efficiency η. Being generic, η(NL) enables engineering of general waveguide systems, e.g., for optimized Raman redshift or supercontinuum generation.
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