Triple-doped Holmium:Chromium:Thulium YAG (Ho:Cr:Tm:YAG) is a laser material which emits radiation at 2097 nm. HCT:YAG can be pumped by a flashlamp or with laser diodes. It is widely used in military, medicine, and meteorology. Lasers are able to work at a room temperature, havę high slope efficiency, and operate at a wavelength where the threshold for eye damage is relatively high. Main diode pump band is at 785 nm but it can also be pumped between 400 and 800 nm.


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Optola offers wide range of HCT:YAG crystals sizes by request. 

Orientation:<111> or <100> crystalline within 5°
Wavefront distortion :λ/8 per inch @ 633 nm
Extinction Ratio:>25dB
Dimension TolerancesRods with diameter: ±0.03 mm , Length: ±0.5 mm
Surface quality:10/5 Scratch / Dig
Parallelism:< 10 arc seconds
Perpendicularity:< 5 arc minutes
Flatness:λ/10 @ 633 nm
chamfer:<0.1 mm @ 45deg.
Barrel Finish:50-80 micro-inch (RMS) ,
AR Coating Reflectivity<0.25%
Laser Wavelength2.097 µm
Photon Energy9.55 x 10-20 J
Emission Cross Section7 x 10-21 cm2
Fluorescence Lifetime8.5 ms
Index of Refraction1.80 @2.08 µm                                   
Absorption Linewidth4 nm
Diode Pump Band                      781 nm
Major Pump Bands400~800 nm
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