Numerical simulation on picosecond synchronously pumped solid-state Raman laser based on KGW crystal

In this paper, a picosecond synchronously pumped solid-state Raman laser with KGW crystal is theoretically studied and numerically simulated. The output pulse waveforms and Raman output characteristics are compared when pumping wavelengths are 532 nm and 1064 nm, respectively. The transient nonlinear coupling equations of stimulated Raman scattering are adopted, and solved numerically. The effects of Raman cavity length detuning, output mirror reflectivity, pumping power, Raman crystal length and pumping pulse width on the conversion of the 1st Stokes pulse are investigated. The simulation results show that the performance of 532 nm synchronously pumped solid-state Raman laser is much better than that of 1064 nm in terms of optical conversion efficiency, pulse width compression, output power and so on, due to higher Raman gain and dispersion at 532 nm. The principle of transient stimulated Raman scattering can be better understood by numerical simulation, and the results can help design and optimize picosecond synchronously pumped solid-state Raman laser.