High-pressure high-current transversely excited Sr+ recombination laser

Abstract
Operation of a transversely excited Sr+ recombination laser at buffer gas (He) pressures up to 1300 Torr and discharge current densities up to 103 A/cm2 is reported. Specific energy densities on the λ430.5‐nm Sr+ line exceed 50 μJ/cm3 for the 30‐cm3 active volume device with no fundamental limitations observed. Double‐pulse experiments indicate pulse repetition frequencies near 1 MHz may be possible.