Cr:Tm:Ho:YAG

 CTH:YAG (Cr,Tm,Ho:YAG)  is an efficient solid-state laser medium for 2097nm generation, widely used in military, medicine, and remote sensing applications. High spectral overlap of pump radiation (lamp or diode) with the Cr3+ and Tm3+ absorption bands, and a highly efficient conversion from the absorption bands into the 5I7 -> 5I8 Ho3+ emission band, enables 2 micron laser architectures with high quantum efficiency.

Applications
Surgery, Dentistry, Atmospheric Testing

CTH: YAG Advantages 
High-efficiency 2 µm source
Cr-Tm transfer quantum efficiency approaching 2
Operates well at room temperature
May be flashlamp or diode pumped
Laser diode sources can be pump the strong 780nm Tm3+ ion absorption line
Chromium doping not necessary for diode-pumped applications
Pump linewidth of 4nm; 4 times wider than the corresponding Nd:YAG diode-pump linewidth
Operates in a relatively eye-safe wavelength range
Should lead to military and scientific applications in coherent radar and range-finding
 
Orientation:
<111> within 5°
Dimensional Tolerance:
Diameter +/-0.1mm ,Length+/-0.5mm
Wavefront Distortion:
<λ/8 at 633nm per inch
Surface Quality:
20/10
Parallelism:
< 10 arc seconds
Perpendicularity:
< 5 arc minutes
Surface Flatness:
<λ/10 at 633nm
Clear Aperture:
Central 95%
Chamfer:
0.15x45°
Coating:
AR@2100nm R<0.2%
 

Standard Products

Part No
Diameter(mm)
Length(mm)
Cut angle
Coating
CTHYAG-4100
4
100
<111>
AR/AR2100 nm
CTHYAG-4110
4
110
<111>
AR/AR2100 nm
CTHYAG-5100
5
100
<111>
AR/AR2100 nm
CTHYAG-5110
5
110
<111>
AR/AR2100 nm
CTHYAG-5115
5
115
<111>
AR/AR2100 nm
CTHYAG-5120
5
120
<111>
AR/AR2100 nm
CTHYAG-6100
6
100
<111>
AR/AR2100 nm