Cr:YAG crystal

Cr, Tm, Ho-doped yttrium aluminum garnet (CTH:YAG)non-linear opticallaser

CTH:YAG is a new crystal material which lases at 2080 nm. It has applications in medical, military and meteorological fields. The key to efficient operation lies in the energy transfer processes between co-dopants of Cr, Tm and Ho. Cr3+ acts to effectively absorb flashlamp energy, which is then transferred to the Tm3+ with an efficiency of > 90%. A Tm:Tm cross relaxation then occurs and transfers this energy to the Ho with a quantum efficiency approaching 2. Advantages Of Cr,Tm,Ho:YAG Include: -High-efficiency 2 µm source -Operates well at room temperature(1) -May be flashlamp or diode pumped -Laser diode sources can pump the strong 780 nm Tm3+ ion absorption line -Chromium doping not necessary for diode-pumped applications -Pump line width of 4 nm; 4 times wider than the corresponding Nd:YAG diode-pump line width -Operates in a relatively eye-safe wavelength range -Applications in medical, military and scientific lasers