Generation of low power and ultrashort laser pulses at 800 nm through soliton compression in chloroform-infiltrated cascaded photonic crystal fibers

Abstract

A unique modest approach to obtain low energy, few-cycle laser pulses at 800 nm through chloroform filled cascaded photonic crystal fiber (PCF) is theoretically presented. Temperature is considered as the control parameter in designing the cascaded PCF to compress femtosecond pulses using higher order soliton compression scheme. The temperature-dependent parameters of both fiber and the infiltrated chloroform liquid are utilized to solve the modified nonlinear Schrödinger equation that facilitates the engineering of ultrashort pulses. Through this method, cascaded PCF could be designed using a single fiber for the generation of short pulses with minimal pedestal energy deprived of any other supplementary modules. We numerically prove that the compression of pulses from an input pulse of 140 fs up to 6.98 fs is possible by using temperature-controlled PCF. The designed fiber compressor is estimated to provide the possible compression factor of 20.05, quality factor of 0.49, output energy of 4.81 pJ, with 50.81% of pedestal energy, through 2.4 cm of entire length.