TSAG Crystal, or Terbium Scandium Aluminum Garnet Crystal, chemical composition Tb3Sc2AI3O12 is a superb magneto-optical material for manufacturing Faraday Optical Isolators of next-generation Fiber Lasers. A Faraday isolator is a critical optical element to mitigate the undesirable feedback in lasers with continuous waves and repetitive pulses which contribute to detrimental thermal effects. TSAG crystals are a prevalent kind of media to manufacture Faraday isolators. TSAG crystal is a novel crystal material and exhibits stronger functionalities than the TGG crystal.

The Verdet constants, the parameter that indicates the material’s strength to induce Faraday rotation, of TSAG crystals are impressive (48 radT^-1m^-1 at 1064 nm, which is 20% higher than TGG crystals). The  TSAG crystal exhibits greater field constant and lower absorption loss (30% lower absorption in comparison with TGG crystals), the fact implies the isolator manufactured using TSAG crystals can be made more compact and makes TSAG crystal a desirable material for high-power optical isolators.

The thermodynamic properties and mechanical properties of TSAG crystals are also outstanding, with the former contributing to contributing to low thermal-induced birefringence. All these virtues mentioned above make TSAG crystals a capable candidate for lasers with high average power, meanwhile allowing compact designs.  With its transmission range spanning broadly from 400nm to 1600nm, TSAG is suitable for lasers operating in the VIS and NIR zones. Besides, TSAG crystals could also be utilized as scintillators, such as integrated radiation detectors or scintillation screens.

Shanghai North Optics offers Czochralski-grown precision-polishing TSAG Crystals for Optical Isolators, Faraday Rotators, and Circulators. The Crystals are of superior surface quality (10/5 S/D) and deposited with transmission rate AR coatings. We are capable of growing TSAG crystals with large apertures and distinguished qualities.