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Faraday rotator glass
 

Faraday rotator glass has been used for magneto-optical isolator, switch, modulator and sensor.

Related Products:

TG20 is a high Verdet constant glass in common uses.

TGP20 is characterized by a high Verdet constant and a lower nonlinear refractive index n2 to avoid self-focusing in high power laser system.

The properity of Faraday Glass:
TG20           TGL20
 
Verdet constant V (min/Oe.cm)
632.8nm -0.258 -0.149
1064nm -0.075 -0.05
Refractive Index n d 1.6888 1.5588
Abbe Number 53.14 62.92
Nonlinear refractive index (10 -13 e.s.u.) 2.46 1.34
Thermal coefficient of refractive index (10 -7 /¡æ) 74 6.9
Thermal coefficient of optical path (10 -7 /¡æ) 105 46
Transmission window (nm) 520-1400 520-1400
Coefficient of thermal expansion (10 -7 /¡æ) 51.3 70
Transition temperature (¡æ) 760 566
Sag temperature (¡æ) 800 596
Density (g/cm3 ) 4.32 3.32
Young's modulus GPa 108 65.2
Poisson's ratio 0.22 0.24
Knoop hardness (Kgf/cm2 ) 760 515
Chemical durability Excellent Excellent