krypton ion laser

https://doi.org/10.1351/goldbook.K03417
A CW or pulsed laser emitting lines from 337 to 859 nm from singly ionized krypton. Principal emissions are at 530.9, 568.2, 647.1 and 752.5 nm.
See: gas lasers
Source:
PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2250 (https://doi.org/10.1351/pac199668122223)