The second harmonic (SH) signal was monitored from a laser plasma created on an Al foil target by the pulses of an iodine photodissociation laser system. Both the time integrated spectra and the time dependence of the output from a narrow spectral interval in the vicinity of the SH were measured. For a p-polarized wave the spectra indicate regions of resonant absorption and of parametric turbulence. Interpretations of physical mechanisms underlying both the spectral regions are given. The dependence of the SH intensity on the incident laser power density is not clearly understood in all cases, but it seems to indicate a possible role of the plasma density scale length changing with the laser energy.

Date Published: 23 April 1993
PDF: 8 pages
Proc. SPIE 1980, Iodine Lasers and Applications, (23 April 1993); doi: 10.1117/12.144509

Published in SPIE Proceedings Vol. 1980:
Iodine Lasers and Applications
Milos Chvojka; Jarmila Kodymova; Bozena Kralikova, Editor(s)