Patent ID: 7099365

Claim:
A fluorine molecular laser device, comprising: main electrodes for performing main discharge in substantially a same direction as an optical axis of laser light to be oscillated to excite a laser gas containing fluorine; an insulator between said main electrodes and into which the laser gas containing fluorine is injected; and mirrors, said insulator being between said mirrors, wherein a resonator length L satisfies a mathematical expression: L≦λ(P, T) 2 /{Δλ L (P)+[Δλ L (P) 2 +4Δλ G (T) 2 ] 1/2 } in relationship with pressure P of the laser gas, temperature T of the laser gas, full width at half maximum Δλ(P, T) of a gain curve, wavelength width Δλ L (P) by Lorents distribution having pressure dependence, and wavelength width λ G (T) by Gaussian distribution having temperature dependence.