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tgg crystal
tgg crystal

TGG Crystals

TGG crystal Terbium Gallium Garnet is an essential magneto-optical crystal l for faraday polarizer. Faraday polarizer is composed of the TGG crystal rod and a specially designed magnet. The polarization of the beam through the magneto-optical materials deflexed and direction of the deflection only has some relations with the direction of the magnetic field and has nothing to do with the direction of the beam propagation. An optical isolator is an optical component which allows the transmission of polarized light in only one direction.


Application of TGG Crystals


  • Faraday Isolators

  • Faraday Polarizer


Advantages of TGG Crystals


  • 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)


Specifications of TGG Crystals


Orientation:

<111>crystalline direction

Wavefront Distortion:

λ/10 per inch @ 632.8 nm

Dimension Tolerances:

rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm

Extinction Ratio

>30dB

Surface Quality:

10/5 Scratch/Dig MIL-O-1380A

Parallelism:

< 10″

Perpendicularity:

< 5′

Clear Aperture:

> 90%

Surface Flatness:

< λ/10 @ 632.8 nm

Chamfer:

< 0.1 mm @ 45°

Size

Upon customer request

Coating

AR coating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use


Basic Properties of TGG Crystals


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


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Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
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