Lifetime Improvement of a LDS698 Solid Dye Laser by Doping with PETA

Abstract

To measure the laserinduced uorescence (LIF) of the Hline (656.3nm) of a hydrogen plasma, we fabricated a LDS698 solid dye laser with PMMA (poly methyl methacrylate). To increase the life-time of the dye laser, we doped pentaerythritol triacrylate (PETA) to the PMMA base. The durability and the emission spectrum shift of a LDS698 solid dye laser were checked for various PETA concentrations (0, 10 and 20 %). The laser could be tuned from 650 nm to 665 nm and had a spectral linewidth of 2 { 3 nm FWHM. The pulse energy of the solid dye laser decreased with operation. When PETA was doped into the PMMA solid-state dye at a concentration of 10 %, after 10,000 pulses, the intensity of the dye laser output decreased to the only 30 % of the rst working intensity. Compared with this result, when PETA was not doped, into the PMMA the intensity decreased to 80 % for the same number of pulses. The relation between the lifetime increase and the heat transfer characteristics was studied by measuring the temperature distribution of the dye cell. The heat transfer rate was the highest when the doping of PETA was 10 %, at ahead, the dye cell had the least thermal degradation and the longest lifetime.