MULTIBEAM PUMPING OF OPA BY RADIATION OF FIBRE AMPLIFIERS

The results of effective optical parametric amplification in KTP crystal pumped by three beams delivered by fibre amplifiers are presented. The second harmonic of three 1.2 ns and 200 µJ pulses each extracted from fibre amplifier have been used to pump optical parametric amplifier (OPA) simultaneously. The conversion efficiency of pump radiation into a signal beam was close to 25%.