Engineering Physics Annotation << Back 3-Fold Reduction in Generation Threshold and 2-Fold Increase in Effi ciency Nd3+:YAG Laser With HF Pumping of the Lamp Ignition Valshin A.M., Orlovich V.A., Bel’kov S.A., Pershin S.M., Pouzyrevsky V.I. A 3-fold reduction in the lasing threshold and a 2-fold increase in the effi ciency of the Nd3+:YAG laser were achieved with high-frequency (HF, 3 MHz) “ignition” of the lamp within 300-400 μs after its HF ignition compared to discharging the capacitance without RF ignition. The laser is assembled on a commercial K301 quantron with an Nd3+:YAG active element (6×60 mm) and a commercial DNP lamp 6×90 with krypton in the resonator (400 mm) with fl at mirrors (100 % and 55 % at a wavelength of 1064 nm). The laser generation threshold was recorded at the second harmonic (532 nm) using a standard indicator made from a pressed LiNbO3 crystal. The use of a mode to increase the effi ciency and stability of generation of large laser complexes due to a decrease in the thermal load on the active elements is discussed. Keywords: pulsed breakdown-ignition of the laser lamp, high-frequency ignition of the lamp before discharging the pump capacitance, lasing threshold and laser effi ciency DOI: 10.25791/infi zik.12.2023.1370 Pp. 03-10.