D2.8x8mm TGG Terbium Gallium Garnet Crystal For Optical Isolator Devices

D2.8*8mm TGG Terbium Gallium Garnet Crystal Material For Optical Isolator Devices

Introduction :

Terbium Gallium Garnet (TGG) is a crystal material for optical isolator devices. Optical isolator devices make use of the non-reciprocal Faraday effect in TGG. The Faraday effect is the rotation of the plane of polarization of a light beam as it is transmitted through the material in the presence of an external magnetic field coaxial with the light. The polarization rotation is in the same sense regardless of the direction of propagation of the light. An optical isolator is a Faraday rotator combined with suitably aligned polarizers which allows light to pass in one direction only.

In recent years, the growth of large-scale, high-quality TGG crystals has been a hot research topic in the field of crystal materials at home and abroad. With the unremitting efforts of the professional R&D team, Crestron successfully grew a TGG crystal with a diameter of 100mm in June 2020.

Crystro offers :

Main Features :

• Large Size Boule Diameter: up to 4 Inches
• Extinction Ratio Typical: >35 dB High Grade: >40 dB
• Verdet Constant 40 rad/T/m at 1064 nm
• Refractive Index 1.95 at 1064 nm

Main Advantages :

1. Large Verdet Constant:35 Rad T^-1m^-1

2. Low Optical Losses : <0.1%/cm

3. High thermal conductivity: 7.4W m^-1K^-1

4. High laser damage threshold :>1GW/cm