Study of broadband optical parametric chirped pulse amplification in a DKDP crystal pumped by the second harmonic of a Nd : YLF laser

摘要

The validity of data on the Sellmeier equation [Kirby K. W. DeShazer L. G., JOSA B 4, 1072-1078 (1987)] modified by linearly approximating the dependence of the linear susceptibility on the deuteration level has been verified experimentally. Conditions for broadband optical parametric amplification of chirped pulses in a DKDP crystal at a pump wavelength of 527 nm have been investigated. It is shown that the DKDP crystal is more suitable than the KDP crystal for powerful OPCPA stages in petawatt lasers. Based on a Cr:forsterite laser and optical parametric amplification in the DKDP crystal, a laser with 0.4-TW power at a wavelength of 911 nm has been developed.