Optical waveguide element, light-receiving device, optical communication device, optical modulator, optical resonator, and method for manufacturing optical waveguide element

摘要

An optical waveguide element includes a core and a cladding that is made of SiO₂. When n_{g_i_TE} is a group refractive index of a TE0 polarized wave in the i-th waveguide counted from a light incidence plane of the core and n_{g_i_TM} is a group refractive index of a TM0 polarized wave in the i-th waveguide, the length L_—i[m] of the i-th waveguide satisfies a predetermined relation.