– c) Molecular lasers – CO2 (10,000 nm = 1000 cm-1) or N2 (337.1 nm) pulsed
– d) Eximer lasers – inert gas + fluorine creates eximers ArF+ (193 nm), KrF+ (248 nm), XeF+ (351)
pulsed
3)Dye
Lasers – tunable over 20 – 50 nm many dyes available for wide range of λ’s
4)Semiconductor Diode Lasers – wide range of λ’s available, continuous