26 Aug 2009 EKSMA OPTICS offers novel unique crystal - lead thiogallate (PbGa2S4) with dysprosium ions (Dy3+) co-doped by alkali metals. Crystal shows efficient laser emission at room temperature in mid IR range at 4.3-5.5 micron wavelengths.
Physical Properties
Transmission range: 0.44-12 microns
Dy3+ concentration in crystal: 0.5 mol.%
Non hygroscopic
Lasing properties with free running 1.318 µm Nd:YAG laser pump
Obtained oscillation wavelengths: 4.3 µm; 4.53 µm; 4.65 µm, 5.5 µm
Absorption at pump: ~1 сm-1
Cross-section at 4.3 mm: 1х10-20 cm2
Lasing treshold: <20 mJ
Lasing pulse duration: <1 ms
Laser efficiency: up to 2%
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