20 W sealed off CuBr vapour laser excited with modified Blumlein circuit

A sealed-off CuBr vapour laser with the maximal average output laser power of 20 W was fabricated and investigated. The corresponding efficiency is 1.2% and the specific average output laser power is 123 mW/cm3 in an active volume of 163 cm3. The lifetime of the laser is more than 300 hours operatin