It is used as a unit combined with optical fiber. TGG (Tb3Ga5O12) has a higher Verdet constant than the existing Tb-doped glass and exhibits an excellent Faraday effect.
And it can be combined for high-power laser, since it has high thermal conductivity.
TAG (Tb3Al5O12), which has higher performance than TGG, is also under development. [R&D page]
① Incident light is rotated 45 degrees by Faraday rotator
② The returned light is further rotated by 45 degrees, and removed by polarizer1.
|Verdet constant [rad/Tm]||20||36|
|Thermal conductivity [W/mK]||0.7||5.0|