Optical modulator that includes optical waveguide formed in ferroelectric substrate

包括形成在铁电衬底中的光波导的光调制器

Abstract

包括形成在铁电衬底中的光波导的光调制器。一种光调制器包括:铁电衬底,在该铁电衬底中形成了输入光波导、第一光波导和第二光波导以及输出光波导;第一电极,其形成在第一光波导附近并被施加第一DC电压;第二电极,其形成在第二光波导附近并被施加第二DC电压;第三电极,其电连接至第一电极并形成在第二电极两侧;以及第四电极,其电连接至第二电极并形成在第一电极两侧。第一电极与第四电极之间的第一间隙和第二电极与第三电极之间的第二间隙大致相同。第三电极与第四电极之间的间隙是第一间隙的1至5倍。
Disclosed is an optical modulator that includes optical waveguide formed in a ferroelectric substrate. The optical modulator includes: a ferroelectric substrate in which an input optical waveguide, first and second optical waveguides, and an output optical waveguide are formed; a first electrode formed in a vicinity of the first optical waveguide and to which a first DC voltage is applied; a second electrode formed in a vicinity of the second optical waveguide and to which a second DC voltage is applied; a third electrode electrically connected to the first electrode and formed on both sides of the second electrode; and a fourth electrode electrically connected to the second electrode and formed on both sides of the first electrode. A first gap between the first electrode and the fourth electrode is approximately the same as a second gap between the second electrode and the third electrode. A gap between the third electrode and the fourth electrode is 1-5 times greater than the first gap.

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