High-Frequency Ignition of a YAG:Nd3+ Laser Lamp with a Folded Decrease of the Intensity of Visible Radiation Range

Abstract

High-frequency (HF) plasma ignition in commercial lamps (frequency 3 MHz, current 100 A) for 150—500 μs after its HF (2 MHz) excitation provides a selective decrease in the radiation intensity in the 400—700 nm band compared to the lamp pumping by a capacitor discharge. It was found that the decrease coefficient of radiation intensity increases with a shortening duration of the HF excitation. In addition, in the emission spectrum of the DKRTV-3000 lamp, an increase in the intensity of the krypton atom lines (587, 760, and 810 nm) was revealed. These lines match the absorption bands of Nd³⁺ ions in the spectrum of the Nd³⁺:YAG laser crystal. Therefore, HF ignition is considered as an alternative to diode pumping for increasing the laser efficiency.