title: Nonlinear soliton matching between optical fibers.
abstract: In this Letter, we propose a generic nonlinear coupling coefficient, η(NL)²=η|γ/β₂|(fiber2)/|γ/β₂|(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 (β₂) 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.
authors: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. cagg@fotonik.dtu.dk
authors: Christian
authors: C
authors: Agger
authors: Simon T
authors: ST
authors: Sørensen
authors: Carsten L
authors: CL
authors: Thomsen
authors: Søren R
authors: SR
authors: Keiding
authors: Ole
authors: O
authors: Bang