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Opt Lett. 2005 Apr 1;30(7):756-8.

Route to broadband blue-light generation in microstructured fibers.

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Fiber-Optics Group, Department of Electrical and Communications Engineering, Helsinki University of Technology, PO Box 3500, FI-02015 HUT, Finland.


We explore theoretically the possibility of generating broadband blue light by copropagating a short soliton pump pulse and a broader signal pulse in a microstructured fiber with a zero-dispersion wavelength located between the center wavelength of the pump and the signal pulses. We show that the unique properties of microstructured fibers should allow for broadening of the signal pulse's spectrum by as much as a factor of 50 through the conjugate action of cross-phase modulation and a soliton self-frequency shift. The physical mechanism that leads to this large spectral broadening is analyzed by use of an extended nonlinear Schrödinger equation.

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