High-Order Stimulated Raman Emission and Two-Photon Stimulated Emission by Photodissociation of PbI₂ Molecules

When focusing YAG laser pulses at 266nm into a heat-pipe oven containing PbI₂ molecules vapor, four red line emissions at 626.0, 619.8, 613.7 and 621.8nm are observed. The photodissociation mechanism of PbI₂ molecules and the possible generation channels of these four line emissions are given. Moreover, the dependence of the emission at 626.0nm on incident laser energy and heat-pipe temperature is measured. The experimental observation is well supported by the photodissociation mechanism proposed by us.