1. Context

Gas lasers

Excimers: F ₂ 157 nm, ArF 193 nm, KrCl 222 nm, KrF 249 nm, XeCl 308 nm

Nitrogen N ₂ : 337.1 nm

Argon: several UV and blue lines, 448.0 nm and 514.5 nm

Krypton: 461.9 nm; 530.8 nm; 647.1 nm and 676.4 nm

Helium-neon: 632.8 nm

CO ₂  : 10.6 µm (10,600 nm)

Liquid lasers

Dye lasers cover the entire range from 210 nm to around 900 nm, but with frequency doubling (rhodamine 6G between 546 and 592 nm).