Holmium:Chromium:Thulium:Ytterium Aluminium Garnate (Ho:Cr:Tm:YAG)  Laser Rods
Holmium:Chromium:Thulium:Ytterium Aluminium Garnate (Ho:Cr:Tm:YAG) lases at a wavelength of 2.1um and is therefore ‘eyesafe’. It has high efficiency and used widely where air cooling is required. Nd:Ce:YAG is versatile and is used across a broad range of applications.

Key strengths of Ho:Cr:Tm:YAG:
  • Lases at - 2100nm (eyesafe)
  • Highly efficient and operates well at room temperature
  • Can be both diode or flash lamp pumped
Ho:Cr:Tm:YAG Laser - Availability
Doping Levels: Ho:0.35%, Cr: 1.5%, Tm:5.8% (typically)
Format: Rods, Discs and Slabs
Sizes: Diameter: 15mm max and Length: 150mm max
Ho:Cr:Tm:YAGz Laser Rod Properties
Laser / Optical Properties Units Value
Laser Wavelengths nm 2097
Emission Linewidth nm <1
Absorption Band Peak nm 781
Absorption Bandwidth nm 4
Emission Cross-section (@1064nm) 10‾²º cm² 70
Fluorescent Lifetime µs 8500
Absorption Coefficient @808nm cm‾¹ 49
Intrinsic Loss @1064nm cm‾¹ <0.003
Refractive Index (n) @ 2080nm 1.8
Thermal Optical Coeff. (dn/dT) @1060nm 10‾⁶/ºC 7.3
Physical / Thermal Properties Units Value
Chemical Formula Y₃Al₅O₂:Nd:Ce
Melting Point ºC 1970
Thermal Expansion Coeff. @20ºC 10‾⁶/ºC 1.5
Thermal Conductivity Coeff. @20ºC W/m/ºK 14
Specific Heat J/g K 0.79
Chemical Durability (@100ºC weigh loss rate distilled water) μg/hr.cm²
Density g/cm³ 4.56
Durability Knoop Hardness kgf/mm²
Mohs Hardness 8.5
Damage Threshold (10ns) J/cm²