Theory and experiment analysis of factors affecting THG efficiency for the TIL prototype laser facility

Based on the study and manufacture of the technical integration experiment line (TIL) prototype laser facility, and using the method that theoretical simulations guide experiments and experimental results check programs, the factors affecting third harmonic generation (THG) efficiency for a large-aperture, high-intensity inertial confinement fusion (ICF) laser facility have been analyzed and studied in detail. Furthermore, in the year 2004–2005, the output ability of a THG system for a TIL driver has been discussed adequately in a first beam eligibility experiment. As shown by experimental results, when the average drive irradiance of fundamental light, I1ω, is 2.7 GW/cm2, the measured value of THG efficiency is 50–55% and the theoretical value is 60%, which indicates that the experimental result agrees well with the theoretical value.