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Er:Cr:YSGG - Erbium, Chromium Co-doped Yttrium Scandium Gallium

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Er:Cr:YSGG  - Erbium, Chromium Co-doped Yttrium Scandium Gallium
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  • Er:Cr:YSGG - Erbium, Chromium Co-doped Yttrium Scandium Gallium

  • Er:Cr:YSGG is an efficient laser crystal for generating 2800 nm light. It features high conversion efficiency, stable chemical properties, long fluorescent lifetime.
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Introduction

Erbium, Chromium doped Yttrium Scandium Gallium Garnet (Er:Cr:YSGG) provides an efficient laser crystal for generating 2800 nm 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.

 

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 

Crystal Structure

Cubic, Garnet

Chemical Formula

Y2.93Sc1.43Ga3.64O12

Lattice Parameter

12.42 Å

Doping Consent

Cr: 0.5 × 1020 (at/cm3),Er: 4 × 1021 (at/cm3)

Growth Method

Czochralski

Density

5.67 g/cm3 (Cr & Er doped)

Refractive Index

1.92 @1000 nm

Thermal Expansion Coefficient

8.1 × 10-6 /K

Thermal Conductivity 

8 (W/m/K)

Mohs Hardness

8 Mohs

Thermo-optical Factor (dn/dT)

12.3 × 10-6 /K

Emission Cross-section 

5.2 × 10-21 cm2

Fluorescent Lifetime

1400 μs

Figure1. Er,Cr:YSGG Absorption Coefficient

 

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