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Er,Cr:YSGG

Er,Cr: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 Er,Cr:YSGG is widely used in dentistry,environmental researching,optical communication,remote sensing technology and military etc.


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Advantages of Er,Cr: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.

 

Table1. Basic Properties of Er,Cr:YSGG

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

 

 

 

Figure1. Er,Cr:YSGG Absorption Coefficient

 

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