| 摘要 |
There is provided an optical device including: a passive core layer in which is formed an optical circuit having a refractive index n2; an active core layer covering at least a portion of the optical circuit, exhibiting an electro-optical effect, and having a refractive index of n1 higher than n2; a lower clad layer over which the passive core layer is formed and having a refractive index n3 lower than n2; an upper clad layer covering the active and passive core layers and having a refractive index n5 lower than n1; a lower electrode disposed below the lower clad layer; and an upper electrode disposed on the upper clad layer, in which the entrance and exit portions of the active core layer are tapered, respectively. |
