A 7-μm praseodymium-based solid-state laser

Cristaux laser à ions de terres rares

“…Cette méthode très pratique a été souvent utilisée ces dernières années dans le cas des transitions laser quasi-3 niveaux 4 …”

Rare-Earth-Doped Low Phonon Energy Halide Crystals for Mid-Infrared Laser Sources

“…CsCdBr 3 ) (for experimental lifetimes of ~0.096 ms in KPb 2 Cl 5 , ~1.57 ms in CsCdBr 3 and ~0.89 ms in Tl 3 PbBr 5 ). Despite similarly weak branching ratios in LaCl 3 crystals, laser operations at 5.2 and 7.2 m could be evidenced [Bowman et al, 1994[Bowman et al, , 1996. Utilizing a flash lamp pumped phosphate glass Kigre laser at 1.54 m, delivering pulse trains of 30 mJ at a frequency of 2 to 10 Hz, no luminescence issued from ( 3 F 4 , 3 F 3 ) multiplets at these two wavelengths could be observed in KPb 2 Cl 5 , CsCdBr 3 and Tl 3 PbBr 5 crystals.…”

“…To date, the longest laser wavelength ever achieved, 7.15 m [Bowman et al, 1994[Bowman et al, , 1996, has been obtained with a 4-mm long LaCl 3 :Pr 3+ (0.7 % at.) single crystal operated in the pulsed regime.…”

New Mid-IR Lasers Based on Rare-Earth-Doped Sulfide and Chloride Materials

“…[2,3] In particular, evaluation of the quantum efficiencies of these hosts is important in their evaluation as a mid-IR host material. In this paper we will summarize the quantum efficiency measurements made for KPb2ClS:Dy3+, and laser results obtained with this crystal and CaGa2S4:Dy3+, and with KPb2C15:Nd3+.…”