Lasing Characteristics of an Electron-Beam-Excited Thallium-Ion Laser

Lasing at Tl+ lines with λ = 1.922, 1.385, 0.595, 0.695, and 0.707 μm was obtained when pumping a Ne + Tl gas-vapor mixture by an electron beam and creating population inversion of Tl+ transitions in the charge exchange reaction; the lasing at the first two lines was implemented for the first time. A linear dependence of the lasing power on the pumping power was derived in the range of pumping parameters under study, which proves the efficiency of the electron-beam excitation. An average lasing power of 44 mW was attained at λ = 595 nm at a pulse repetition frequency of 1 kHz with an efficiency of ∼0.06%. Energy parameters of the laser were numerically simulated.