GGG, SGGG and NGG Garnets are used as substrates for liquid expitaxy. GGG substrates is dedicated substrates for magneto-optical film. In the optical communication devices, require a lot of using 1.3μ and 1.5μ optical isolator, its core component is the YIG or BIG film been placed in a magnetic field. GGG single crystal substrates of different tangential, which can achieve the best lattice match with this magneto-optical material, thus ensuring the YIG and BIG film epitaxial growth be successful. It has good physical and mechanical properties and chemical stability. GGG is also substrate material for microwave devices.
