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Nonlinear soliton matching between optical fibers
Christian Agger1, Simon T Sørensen, Carsten L Thomsen
1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. cagg@fotonik.dtu.dk
Optics Letters
|July 5, 2011
Summary
We introduce a new nonlinear coupling coefficient to quantify how optical solitons transfer between fibers. This metric aids in optimizing fiber systems for applications like Raman redshift and supercontinuum generation.
Area of Science:
- Nonlinear optics
- Optical fiber communications
- Waveguide engineering
Background:
- Efficiently coupling optical solitons between different fibers is crucial for advanced photonic applications.
- Existing methods often focus on linear mode matching, potentially overlooking critical nonlinear effects.
Purpose of the Study:
- To propose a generic nonlinear coupling coefficient, η(NL), for quantifying soliton coupling efficiency between optical fibers.
- To demonstrate the utility of η(NL) in optimizing nonlinear processes such as soliton self-frequency shift.
Main Methods:
- Development of the nonlinear coupling coefficient formula: η(NL)²=η|γ/β₂|(fiber2)/|γ/β₂|(fiber1).
- Experimental demonstration of significant soliton self-frequency shift using the proposed coefficient.
- Comparison of nonlinear matching against linear mode matching criteria.
Main Results:
- The nonlinear coupling coefficient η(NL) effectively quantifies soliton coupling efficiency.
- Nonlinear matching was shown to be a dominant factor, even surpassing linear mode matching.
- A significant soliton self-frequency shift was achieved, validating the coefficient's predictive power.
Conclusions:
- The generic nonlinear coupling coefficient η(NL) provides a powerful tool for designing and optimizing waveguide systems.
- This coefficient enables precise engineering for applications requiring efficient nonlinear interactions, such as Raman redshift and supercontinuum generation.
