Supercontinuum generation and nonlinear pulse propagation in photonic crystal fiber: influence of the frequency-dependent effective mode area

In this paper, we describe how the frequency-dependence of the effective area can be conveniently included in NEE approaches to model pulse propagation in PCF through a modified optical shock term. We plot the supercontinuum (SC) characteristics expected for 6 kW peak power 100 fs duration input pulses at 1064 nm in 50 cm of PCF both neglecting and including the shock term correction, showing an effective 100 nm reduction in the SC bandwidth due to the effective area frequency-dependence. It is concluded that the detailed continued study of SC generation in PCF for pumping far from the ZDW in the infrared will require the inclusion of shock term correction term in NEE models