Promising magneto-optical ceramics for high power Faraday isolators

Magneto-optical ceramics with excellent optical quality, large size and high Verdet constant can be used in high powder Faraday isolators of the next-generation. In this viewpoint, fabrication, microstructure, properties and applications of some promising magneto-optical ceramics, namely polycrystalline garnet and sesquioxide based materials, are mainly demonstrated. And we also propose the composition design, performance optimization and function expansion of the transparent magneto-optical ceramics.