Process for producing a material for wide band optical isolators

摘要

A material for use in a 1.5 mu m wide-band optical isolator, includes a bismuth-substituted terbium-iron garnet single crystal having a composition of BixTb3-xFe5O12 in which x is 0.35 to 0.45. This bismuth-substituted terbium-iron garnet single crystal is grown by a solid phase reaction. A process for producing such a material is also disclosed.