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Faraday 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:
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 |