Resumo

ARTEAGA-SIERRA, F.R. et al. Optimization for maximum Raman frequency conversion in supercontinuum sources using genetic algorithms. Rev. mex. fis. [online]. 2017, vol.63, n.2, pp.111-116. ISSN 0035-001X.

A frequency convertor based on the soliton self-frequency shift by the supercontinuum generation is obtained by optimization of only three parameters of a Ti:Sapphire laser pulse, namely, carrier wavelength, peak power and time duration. The frequency conversion is performed and calculated by simulating the propagation of the pulse in a simple piece of 25 cm long commercial photonic crystal fiber pumped by the femtosecond Ti:Sapphire laser, whose only pre-requisite is to exhibit the standard supercontinuum. The resulting spectral broadening has a maximum spectral conversion in the anomalous region just by playing with the three realistic controllable parameters. Optimization is performed using pre-defined functions of genetic algorithms. Our results indicate that the efficiencies of Raman conversion achieved by merely optimizing the pulse parameters in a commercial fiber are comparable with those obtained in more elaborated Raman convertor devices.

Palavras-chave : Solitons in optical fibers; nonlinear optics; optical frequency converters.