Enhanced Femtosecond Optical Pulses Compression Induced by Negative Third-Order Dispersion in Solid-Core Photonic Crystal Fibers

In this paper, the chirped- free optical pulses compression through propagating in silica - index guiding photonic crystal fibers will be studied. The results show that the Raman Effect can enhances the quality of compressed pulses and also the positive third-order dispersion (TOD) can be considered as the main reason in limiting the optical pulses compression. We will show that, the combined effects of the Raman scattering and negative TODs can causes generating much further compressed pulses in comparison with applying the only Raman effect or combination of that with the positive TODs. In this paper, We also numerically present a novel technique to solve the wave propagation equation, which is known as the concrete algorithms of split-step fourier method and fourth order Runge-Kutta (RK4) method. This method has a higher accuracy, although the computational time is longer because the number of calculation steps is chosen very large.