Highly effective generation of the second and fourth harmonics of high-power picosecond pulses
Volosov V.D., Krylov V. N., Serebryakov V.A., Sokolov D.V.
We report experimental realization of the theoretically maximal coefficient for the conversion of laser emission into the second harmonic, and also high-efficiency generation of the fourth harmonic of picosecond pulses (efficiencies 80 and 30%, respectively).