Efficient spectral broadening of supercontinuum in photonic crystal fiber with self-phase modulation induced by femtosecond laser pulse

Abstract

The authors experimentally demonstrated the generation of a supercontinuum (SC) in a photonic crystal fiber (PCF) using laser power of 0.8 W with 100 fs pulse duration at 1028 nm wavelength. The SC spectrum extended from 420 nm to 1650 nm using a 10 cm long PCF, for a wavelength difference of 275 nm between the pump laser and the zero dispersion wavelength (ZDW). This extension of the SC originates from the self-phase modulation induced broadening in the PCF of the femtosecond laser pulse. This study shows the effectiveness of this technique to extend the SC spectrum.