Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6888295 | Optical Fiber Technology | 2018 | 11 Pages |
Abstract
We demonstrate ultrafast soliton-based nonlinear balancing of dual-core asymmetry in highly nonlinear photonic crystal fiber at sub-nanojoule pulse energy level. The effect of fiber asymmetry was studied experimentally by selective excitation and monitoring of individual fiber cores at different wavelengths between 1500â¯nm and 1800â¯nm. Higher energy transfer rate to non-excited core was observed in the case of fast core excitation due to nonlinear asymmetry balancing of temporal solitons, which was confirmed by the dedicated numerical simulations based on the coupled generalized nonlinear Schrödinger equations. Moreover, the simulation results correspond qualitatively with the experimentally acquired dependences of the output dual-core extinction ratio on excitation energy and wavelength. In the case of 1800â¯nm fast core excitation, narrow band spectral intensity switching between the output channels was registered with contrast of 23â¯dB. The switching was achieved by the change of the excitation pulse energy in sub-nanojoule region. The performed detailed analysis of the nonlinear balancing of dual-core asymmetry in solitonic propagation regime opens new perspectives for the development of ultrafast nonlinear all-optical switching devices.
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Authors
L. Curilla, I. Astrauskas, A. Pugzlys, P. Stajanca, D. Pysz, F. Uherek, A. Baltuska, I. Bugar,