Coversion of a chirped radiation pulse into the second harmonic in a KDP crystal
The results of investigations on conversion of the radiation with the wavelength l = 950 and pulse duration 100 ps into the second-harmonic pulse is reported. It is shown that the duration of the second-harmonic pulse is twice shorter than that of the fundamental frequency. The line width of the converted radiation remains to be unchanged. The beam quality parameter М<sup>2</sup> increases from 1.16 to 1.56. The maximum conversion efficiency is found to be 12.2 %.