Improvement of the Lasing Perfomance of Copper Viapor Laser by Adding Ag and/or Cs Atoms

The lasing performance of acopper vapor laser (CVL) with 60 mm diameter and 2000 mm discharge length has bee nsuccessfully improved by adding Ag and/or Cs atoms. As typical results, 33% increase of output power and wall-plug efficiency has been obtained. The upper laser level is enhanced by the collisional energy transfer from are sponse of Ag atoms to a resonance-excited state of Cuatoms. In addition, the effective relaxation of the lower laser level is appeared due to the collision of the second kind between the metastable Cu atoms and adding Cs atoms.