Attainment of quasicontinuous lasing due to F2+ and F3– color centers in NaF and its use in intracavity spectroscopy

Quasicontinuous lasing was attained in an NaF:F₂⁺ :F₃^– crystal subjected to laser excitation. Stimulated infrared radiation lasting for about 0.5 msec was emitted in the wavelength interval Δλ = 0.98–1.4 μ, which made it possible to construct an intracavity spectrum analyzer with a maximum sensitivity κ ≈ 5×10^–9cm^–1.