All-Solid-State 589-Nm Pulse Generation Using Sum Frequency Of Stokes Raman Lasers

We report a 589-nm laser using the sum-frequency generation (SFG) of 1.158- and 1.197-mu m Stokes Raman lasers. These Stokes lasers are based on two KGd(WO4)(2) and Ba(NO3)(2) external Raman laser oscillators. First, a high-energy 1064-nm source was built to pump stimulated Raman scattering. Multiorder Stokes lasers with pulse energies of 402 and 220 mJ were generated from Raman laser oscillators with 2.26-J pumping. Furthermore, these two Stokes beams were simultaneously delivered into a potassium dihydrogen phosphate crystal for SFG. Finally, a 31.7-mJ laser at 589 nm was achieved with pulse duration of 6.9 ns and repetition rate of 1 Hz. These experimental results provide practical alternative to generate high-energy short-pulse 589-nm laser beams for related applications. (c) 2021 Society of Photo Optical Instrumentation Engineers (SPIE)