In this contribution we report on blue generation of Pr:YAP laser under flash‐lamp pumping at room temperature. Stimulated emission at 373.5 nm has been reached by intracavity frequency doubling of the red‐emitting Pr:YAP laser operating in Q‐switched pulsed regime at a fundamental wavelength of 747 nm. For Q‐switching, electro‐optical modulator based on LiNbO3 Pockels cell in quarter‐wave configuration was used. Employing BBO crystal as a nonlinear medium for second harmonic generation, blue radiation with a pulse energy and length of 380 μ J and 38 ns, respectively, were generated. The red‐to‐blue conversion efficiency was determined to be more than 31%. (© 2010 by Astro Ltd., Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA)