Lithium niobate laser with frequency-degenerate pumping
Odulov S. G., Soskin M. S.
For the first time, lasing has been achieved in a frequency-degenerate four-wave interaction of beams from a helium-cadmium laser in lithium niobate crystals with nonlocal nonlinearities. The nonlinearities result from a redistribution of space charge during diffusion of the photoexcited carriers or from photovoltaic currents that oscillate over space.