Optical limiting effect of C-70 solution at 1064 nm

摘要

In this paper, we investigate the optical limiting effect of C(70 )solution at a wavelength of 1064 nm. We experimentally measured the transmittance of C-70 solution under three different concentrations (0.25, 0.5, and 1 mmol/L), three different solution thicknesses (5, 10, and 20 mm), and two different solvents (toluene and xylene) and obtained the values of absorption cross sections and relaxation times in the five-level absorption model of Co-70 solution. The influences of concentration, thickness, and solvent on the optical limiting effect of the C-70 solution are analyzed. We also measured transmittance of C-60 solution under the same conditions and compared the results with those of C-70 solution. The experimental results show that concentration and solution thicknesses have great influence on the optical limiting ability of C-70 solution. The optical limiting effect of C-70 solution is better than that of C-60 solution at low concentration and worse than that of C(60 )solution at high concentration. (C) 2020 Optical Society of America