Faraday isolators for high-power lasers using magneto-optical glass

We have developed a Faraday isolator for high-power lasers using magneto-optical glass. The thermally induced depolarization of the glass was evaluated, and it was found that the depolarization ratio was lower than that of TGG. Furthermore, we fabricate an optical isolator with a φ12 mm aperture and evaluated its characteristics. Since glass has significant advantages in homogeneity and mass production, it can greatly contribute to quality stabilization of optical isolators.