MgO Crystal Substrates

DescriptionGadolinium Gallium Garnet (GGG,Website:, Gd3Ga5O12) is a magneto-optical and microwave substrate. It is the best substrate material for infrared optical isolator (1.3 and 1.5um), which is a very important device in optical communication. It is made of YIG or BIG film on the GGG substrate plus birefringence parts. Also GGG is an important substrate for microwave isolator and other devices. Its physical, mechanical and chemical properties are all good for the above applications.SpecificationPolishing Specifications for Substrate GradeⅠOrientation Tolerence<30ˊThickness/Diameter Tolerance±0.10 mmSurface Flatness<(λ-2λ)@632nmSurface Quality(1.0-2.0)nmParallel10ˊPerpendicular60ˊChammfer<0.2×45°Polishing Specification for Substrate Grade ⅡOrientation Tolerence<18ˊThickness/Diameter Tolerance±0.05 mmSurface Flatness<(λ/2-λ/4)@632nmSurface Quality(0.3-1.0)nmParallel1ˊPerpendicular30ˊChammfer<0.2×45°Polishing Specification for Substrate Grade ⅢOrientation Tolerence<12ˊThickness/Diameter Tolerance±0.02 mmSurface Flatness(λ/4-λ/6)@632nmSurface Quality<0.3nmParallel45〞Perpendicular20ˊChammfer<0.2×45°

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