TGG

TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.

Advantages of TGG:

  • Large Verdet constant (35 Rad T-1 m-1)
  • Low optical losses (<0.1%/cm)
  • High thermal conductivity (7.4W m-1 K-1).
  • High laser damage threshold (>1GW/cm2)

Basic Properties:

Chemical Formula
Tb3Ga5O12
Lattice Parameter
a=12.355Å
Growth Method   
Czochralski
Density
7.13g/cm3
Mohs Hardness
8.0
Melting Point
1725℃
Refractive Index
1.954 at 1064nm 




Technical Parameters:

  • Orientation: [111],±15′

  • Wavefront Distortion: <λ/8

  • Extinction Ratio: >30dB

  • Diameter Tolerance: +0.00mm/-0.05mm  

  • Length Tolerance: +0.2mm/-0.2mm

  • Chamfer: 0.10mm @ 45°

  • Flatness: <λ/10 at 633nm

  • Parallelism: <30′

  • Perpendicularity: <5′

  • Surface Quality: 10/5

  • AR coating: <0.2%