Abstract
The most commonly used crystal architecture to produce 2µm laser is co-doping Ho and Tm into a single host crystal. In this method, the stored energy transfer from the Tm 3F4 to the Ho 5I7 manifold is not fast enough to warrant high efficiency for short pulse applications. By separating the Ho and the Tm ions and doping the Tm in YALO3 and the Ho in YLF, we were able to directly pump the Ho 5I7 manifold with 1.94µm. The Ho:YLF laser has produced 33 mJ at 2.062 µm with a quantum efficiency of 0.88. The performance of each laser will be presented.
© 2000 Optical Society of America
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