Output of 1 319 nm and 1 338 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 1 318.8 nm and 1 338 nm wavelengths,but about 7% at 1 064 nm; the output mirror was coated with the transmissions of 34.7% and 32.5% at 1 319 nm and 1 338 nm, respectively, the transmittance of the output mirror was 95 % for 1 064 nm laser in the experiment. The strongest 1 064 nm line was effectively suppressed and a 1 319 nm and 1 338 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 1 318.8 nm and 1 338.2 nm with the FWHM of 0.3