Output of 1319 nm and 1338 nm dual wavelength Nd:YAG pulse laser

On the basis of the calculation result of the simultaneous dual wavelength threshold condition, the reflectivities of reflection mirror were more than 99.73% at 1318.8 nm and 1338 nm wavelengths, but about 7% at 1064 nm; the output mirror was coated with the transmissions of 34.7% and 32.5% at 1319 nm and 1338 nm, respectively, the transmittance of the output mirror was 95% for 1064 nm laser in the experiment. The strongest 1064 nm line was effectively suppressed and a 1319 nm and 1338 nm dual wavelength Nd:YAG pulsed laser was successfully developed. The output energy of 0.89 J was obtained at the pump energy of 125 J with the total efficiency of 0.71% and the slope efficiency of 0.89%. The central wavelengths of the output laser are 1318.8 nm and 1338.2 nm with the FWHM of 0.35 nm and 0.48 nm, respectively. The intensity ratio of 1319 nm to 1338 nm wavelengths is 36:44.