Faraday Rotator Glass

Faraday rotator glass has been used for magneto-optical isolator, switch, modulator and sensor. Faraday rotator glasses have been developed by CLASER.

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:

Verdet constant V (min/Oe.cm)	TGP20
632.8nm	-0.258
1064nm	-0.075
Refractive Index n d	1.6888
Abbe Number	53.14
Nonlinear refractive index (10 -13 e.s.u.)	2.46
Thermal coefficient of refractive index (10 -7 /℃)	74
Thermal coefficient of optical path (10 -7 /℃)	105
Transmission window (nm)	520-1400
Coefficient of thermal expansion (10 -7 /℃)	51.3
Transition temperature (℃)	760
Sag temperature (℃)	800
Density (g/cm 3 )	4.32
Young's modulus GPa	108
Poisson's ratio	0.22
Knoop hardness (Kgf/cm 2 )	760
Chemical durability	Excellent