Generation and Stability Analysis of Self Similar Pulses Through Specialty Microstructured Optical Fibers in Mid Infrared Regime

摘要

We report a numerical study on generation and stability of parabolic pulsesduring their propagation through highly nonlinear specialty optical fibers.Here, we have generated a parabolic pulse at 2.1 $\mu$m wavelength from aGaussian input pulse with 1.9 ps FWHM and 75 W peak power after travellingthrough only 20 cm length of a chalcogenide glass based microstructured opticalfiber (MOF). Dependence on input pulse shapes towards most efficient conversioninto self similar states is reported. The stability in terms of any deviationfrom dissipative self-similar nature of such pulses has been analyzed byintroducing a variable longitudinal loss profile within the spectral losswindow of the MOF, and detailed pulse shapes are captured. Moreover, threedifferent dispersion regimes of propagation have been considered to study thesuitability to support most stable propagation of the pulse.