RADIATION INTERFERENCE ON TRIPLE AND COMBINATION FREQUENCIES AT THE SIMULTANEOUS NONLINEAR REFLECTION OF TWO FEMTOSECOND PULSES AT THE FUNDAMENTAL AND DOUBLED FREQUENCIES FROM A DIELECTRIC MEDIUM
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The paper presents theoretical and experimental results of simultaneous nonlinear reflection of two femtosecond pulses at the fundamental ω1 and doubled ω2= 2ω1frequencies from a dielectric medium. It is shown that the reflection of the two-component radiation leads to light pulses generating at the triple and combination frequencies. Moreover, the reflected triple frequency radiation spectrum represents a superposition of two components: the triple 3ω1and combination 2ω2- ω1. Interference between these two components leads to spectrum modulation at 3ω1frequency while the time delay changing between the incident pulses.