Effect of ultra-short pulse laser for second harmonic generation in CsLiB_6O_(10)

摘要

The coupled equations of sceond harmonic generation of ultra-short pulse through a nonlinear optical crystal CsLiB_6O_(10) is solved using the Fourier method. The second harmonic pumped by 532 nm, 50 is fundamental wave through CsLiB_6O_(10) is simulated numerically. The results point out that the pulse ol second harmonic is widened and the harmonic shape is deformed because of group velocity mismatch and group velocity dispersion. The pulse of SHG is widened to 100 fs and the pulse shaping of SHG is delayed to 50～60 fs when the CsLiB_6O_(10) crystal length is 0.5 mm.