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Faraday Rotator Glass

Faraday Rotator GlassFaraday Rotator Glass has been used in manufacturing of faraday rotational components based on Faraday character of the polarization plane, such as Optical Isolator, Circulator, Magneto-optical modulator, fast Optical Switches, Interleavers, Laser gyroscopes, Goniometric devices, magneto-optic storage and optical information process system, current measuring transducers by magnetic field measuring and high-voltage transmission line, new generation current sensors, wave guides, free space light control, satellite survey and other functional devices.


Bluebean Optical provide two types of faraday rotator glasses-TG20 and TG27.


Faraday Rotator Glass Properties:


 

 TG20

 TG27

  Verdet constant V (min/Oe.cm)

 

 

                                              632.8nm

 -0.258

 -0.36

                                              1064nm

 -0.075

 -0.107

  Refractive Index nd

 1.6888

 1.7500

  Abbe Number

 53.14

 50.98

  Nonlinear refractive index (10-13 e.s.u.)

 2.46

 2.42

  Thermal coefficient of refractive index (10-7/)

 74

 -

  Thermal coefficient of optical path (10-7/)

 105

 -

  Transmission window (nm)

 520-1400

 520-1400

  Coefficient of thermal expansion (10-7/)

 51.3

 69

  Transition temperature ()

 760

 759

  Sag temperature ()

 800

 800

  Density (g/cm3)

 4.32

 4.99

  Young’s modulus (GPa)

 108

 -

  Poisson’s ratio

 0.22

 -

  Knoop hardness (Kgf/cm2)

 760

 -

  Chemical durability

 Excellent

 Excellent


Transmission of Faraday Rotator Glass:


Transmission of Faraday Rotator Glass


Faraday Rotator Glass Product Specifications: 


  Diameter Tolerance

 +/-0.05mm

  Length Tolerance

 +/-0.05mm

  Flatness

 < λ/8 at 632.8nm

  Surface quality

 10-5 scratch/dig

  Parallelism

 < 5 seconds

  Clear Aperture

 >90%

  Edge chamfer

 0.1mm x 45 degree

  Extinction ratio

 > 42 dB

  AR Coating

 R<0.2%

  Damage threshold

 > 10 J/cm2, 10ns, 1064nm