Intracavity spectrum analyzer based on LiF with flashlamp excitation of color centers

A single excitation source (in the form of a xenon flashlamp) was combined with spectral converters to demonstrate lasing due to F₂, F₂⁺, and F₂^– color centers in LiF. A universal spectrum analyzer for the investigation of gases and plasmas was constructed. Polychromatic quasi-cw lasing was excited by flashlamp pumping of color centers and this made it possible to widen the spectral range of the analyzer and to increase its sensitivity. The results indicated that it should be possible to construct "soft" apertures and switches (shutters) for visible laser radiation.