Effect of the polarization characteristics of the output mirror coating on the second harmonic generation: Theoretical analysis

Effect of the polarization characteristics of the output mirror coating of a V-shaped cavity blue diode pumped solid-state laser on the second harmonic generation is presented. The reflection-induced phase shift of the coating can cause a maximum 6% decrease of the conversing efficiency of the fundamental wave to the second harmonic wave. The transmission-induced phase shift of the coating can decrease the degree of linear polarization of the second harmonic output. In the case that the angles of both the polarization direction of the fundamental wave and the O-axial of LBO with respect the incident plane are equal and less than five degrees and the incident angle less than 30 degrees, the effects can be neglected. Conditions that can avoid the effect of the polarization characteristics of the output mirror coating on the second harmonic generation are also given.