Title: Research of influence of parameters of ultrashort pulse on intensity of precursors
Abstract: Simulation of short optical pulses in the planar waveguide of silica glass showed that in the case of initial rectangular pulse with a carrier wavelength λ0=532 nm (away from resonance) and pulse duration equal 0,5λ0(n+0,5), n - an integer, precursors intensity increases by about 2 at a distance of tens of microns away from the origin. Although intensity of precursors is about 1% compared with the intensity of the main pulse. But if you choose the length of the pulse wave at the nearest resonance (λ0=120 nm), the intensity of the precursors may exceed the intensity of the main pulse of 4 times.