copper vapour laser

https://doi.org/10.1351/goldbook.C01338
A pulsed source of
coherent radiation
emitting at 578.2 nm and 510.5 nm from excited copper atoms.
See:
gas lasers
,
laser
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2234 [Terms] [Paper]