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TSAG - Terbium Scandium Aluminum Garnet

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TSAG - Terbium Scandium Aluminum Garnet
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  • TSAG - Terbium Scandium Aluminum Garnet

  • As an ideal magneto-optic crystal in visible and infrared regions, TSAG has the advantages of high Verdet constant, excellent thermal and mechanical properties.
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IntroductionTerbium Scandium Aluminum Garnet (Tb3Sc2Al3O12, TSAG) is the key isolator material for next generation fiber laser. As an ideal magneto-optic crystal in visible and infrared regions, TSAG has the advantages of high Verdet constant, excellent thermal and mechanical properties.

 

CASTECH's magneto-optical crystal TSAG  is featured by

  • Large Verdet constant (48 radT-1m-1 at 1064 nm),about 20~30% higher than that of TGG
  • Low absorption (< 3000 ppm/cm at 1064 nm), about 30% less than that of TGG
  • High power compliant
  • Low thermally-induced birefringence
  • Ideal for compact magneto-optic devices

 

Main Applications

  • Faraday Rotator
  • Optical Isolator

 

Table 1. Basic Properties

  Transparency Range

400-1600 nm

  Crystal  Structure

Cubic, Space group Ia3d

  Chemical Formula

Tb3Sc2Al3O12

  Lattice Parameter

a = 12.3 Å

  Growth Method

Czochralski

  Density

5.91 g/cm3

  Melting Point

1970 ℃ ± 10 ℃

 

Specifications of TSAG crystal from CASTECH

Table 2. Specifications

Orientation

within±15′

Extinction Ratio

> 30 dB

Diameter Tolerance

± 0.1 mm

Length Tolerance

± 0.2 mm

Surface Qquality (scratch/dig)

10/5 to MIL-PRF-13830B

Flatness

< λ/8 @633 nm

Wavefront Distortion

< λ/8 @633 nm

Parallelism

20 arc sec

Perpendicularity

≦ 15 arc min

Chamfer

≦ 0.2 mm × 45°

AR coating

< 0.2% @1064 nm

Other coatings are available upon request

 

 

 

  • Magneto-Optical Crystals_Terbium Scandium Aluminum Garnet(TSAG) Crystal.pdf

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    2020-11-19 10:57:13
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