| 摘要 |
An optical waveguide element is provided with a rib-type waveguide having a core that has a rib portion, and a pair of slab portions including a first slab portion and a second slab portion that are connected respectively to both ends of the rib portion so as to sandwich the rib portion. The rib portion has a cross-sectional dimension that allows the propagation of light of a basic mode and a high-order mode in a preset single polarization state, and has a first P-type semiconductor and a first N-type semiconductor that form a PN junction. The first slab portion has a second P-type semiconductor and a P-type conductor that are connected to each other, the second P-type semiconductor being connected to the first P-type semiconductor of the rib portion. The second slab portion has a second N-type semiconductor and an N-type conductor that are connected to each other, the second N-type semiconductor being connected to the first N-type semiconductor of the rib portion. |
