Erbium:Ytterium Aluminium Garnate (Er:YAG) Laser Rods
Erbium:Ytterium Aluminium Garnate (Er:YAG) lases at a wavelength of 2940nm. It has good optical and thermal properties and generally superior to Er:Glass. Er:YAG is versatile and is used across a broad range of applications, especially medical.

Key strengths of Er:YAG:
  • Lases at 2940nm
  • High level of efficiency
  • Good optical and thermal properties
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Er:YAG Laser - Availability
Doping Levels: <50%
Format: Rods, Discs and Slabs
Sizes: Diameter: 10mm max and Length: 150mm max
Er:YAG Laser Rod Properties
Laser / Optical Properties Units Value
Laser Wavelengths nm 2940
Emission Linewidth nm <1
Absorption Band Peak nm 700
Absorption Bandwidth nm 200
Emission Cross-section (@1064nm) 10‾²º cm² 3
Fluorescent Lifetime µs 90000
Absorption Coefficient @808nm cm‾¹ 49
Intrinsic Loss @1064nm cm‾¹ <0.003
Refractive Index (n) @ 2940nm 1.79
Thermal Optical Coeff. (dn/dT) @nm 10‾⁶/ºC 7.3
Physical / Thermal Properties Units Value
Chemical Formula Y₃Al₅O₂:Er
Melting Point ºC 1970
Thermal Expansion Coeff. @20ºC 10‾⁶/ºC 9.5
Thermal Conductivity Coeff. @20ºC W/m/ºK 0.12
Specific Heat J/g K 0.79
Chemical Durability (@100ºC weigh loss rate distilled water) μg/hr.cm²
Density g/cm³ 5.35
Durability Knoop Hardness kgf/mm²
Mohs Hardness 8.5
Damage Threshold (10ns) J/cm²