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Proceedings Paper

Solitonic spectral transformations in double core photonic crystal fiber
Author(s): I. Bugar; I. V. Fedotov; A. B. Fedotov; J. Chlpik; D. Lorenc; R. Buczynski; D. Pysz; F. Uherek; A. M. Zheltikov
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Paper Abstract

Nonlinear propagation of femtosecond pulses in double core square lattice PCF made of multicomponent glass was investigated experimentally at excitation wavelength 1250 nm in the anomalous dispersion region. The obtained results expressed soliton fission and self frequency shift in the anomalous region, inspected by IR registration, with increasing complexity by increasing excitation energy. The visible registration, inspecting the normal dispersion region, exhibited soliton induced dispersive wave generation with blue shifting feature suggesting nonlinear phase change effect on the phase matching condition. The width of the overall spectral feature approached two octaves at approximately 10 nJ excitation energy in 6 cm long fiber sample. The knowledge about the evolving processes was extended by numerical simulation of the nonlinear propagation in the near IR region in reasonable correspondence with the experimental results. Furthermore, separate registration of the visible spectral features originating from the two fiber cores was ensured exhibiting significant differences between the multipeak spectra. The two core spectral content differences was possible to further alternate by rotation of the excitation polarization direction with application potential for polarization switched directional coupler accompanied by frequency conversion. Finally, single versus double core excitation conditions were compared. The double core excitation resulted in smoother spectral features, both in the case of IR and visible registration, at requirement at expense higher excitation energies needed for broadband supercontinuum generation.

Paper Details

Date Published: 21 April 2008
PDF: 10 pages
Proc. SPIE 6990, Photonic Crystal Fibers II, 69900R (21 April 2008); doi: 10.1117/12.783331
Show Author Affiliations
I. Bugar, International Laser Ctr. (Slovak Republic)
I. V. Fedotov, M.V. Lomonosov Moscow State Univ. (Russia)
A. B. Fedotov, M.V. Lomonosov Moscow State Univ. (Russia)
J. Chlpik, International Laser Ctr. (Slovak Republic)
D. Lorenc, International Laser Ctr. (Slovak Republic)
R. Buczynski, Univ. of Warsaw (Poland)
D. Pysz, Institute of Electronic Materials Technology (Poland)
F. Uherek, International Laser Ctr. (Slovak Republic)
A. M. Zheltikov, M.V. Lomonosov Moscow State Univ. (Russia)


Published in SPIE Proceedings Vol. 6990:
Photonic Crystal Fibers II
Kyriacos Kalli; Waclaw Urbanczyk, Editor(s)

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