Er:YSGG/Er,Cr:YSGG

Cr:Er:YSGG (Erbium,Chromium doped Yttrium Scandium Gallium Garnet) provides an efficient laser crystal for generating 2800nm light in an important water absorption band. It becomes one of the most promising laser crystals recently owing to its high conversion efficiency,stable chemical properties,long fluorescent lifetime. Now Cr:Er:YSGG is widely used in dentistry,environmental researching,optical communication,remote sensing technology and military etc.

Advantages of Cr:Er:YSGG:

  • Lowest threshold and highest slope efficiency of common Erbium doped crystals;
  • High conversion efficiency;

  • Operates CW, free-running or Q-switched;
  • High optical quality;
  • The intrinsic crystal disorder increases pump line widths and tenability;
  • Can be flash lamp pumped via Cr bands or diode pumped via  Er bands;
  • Long fluorescent lifetime.

Basic Properties:

Crystal structure
Cubic,Garnet
Growth Method
Czochralski
Chemical formula
Y2.93Sc1.43 Ga3.64O12
Lattice constant
12.42Å
Doping content(at/cm3
Cr:5×1020,Er:×1021
Density
5.67g/cm3(Cr&Er doped)
Refractive index
1.92 at 1000nm
Thermal expansion coefficient
8.1×10-6/K
Thermal conductivity(W/mK)
8
Hardness(Mohs)
8
Thermo-optical factor(dn/dT)(10-6/K) 
12.3
Emission cross-section(cm2)
5.2×10-21
Fluorescent Lifetime
1400μs
Technical Parameters:

  • Rod Diameters: up to 15 mm

  • Diameter Tolerance: +0.0000 / -0.0020 in

  • Length  Tolerance: +0.040 / -0.000 in

  • Tilt / Wedge Angle:±5 min

  • Chamfer: 0.005 ±0.003 in

  • Chamfer Angle: 45 deg ±5 deg

  • Barrel Finish: 55 micro-inch ±5 micro-inch

  • Parallelism:30 arc seconds

  • End Figure:λ / 10 wave at 633 nm

  • Perpendicularity:5 arc minutes

  • Surface Quality:10 - 5 scratch-dig

  • Wavefront Distortion:1/2 wave per inch of length