| 摘要 |
In a polarization diversity optical receiving apparatus, signal light (16) is first divided in a polarization separating portion (7) into two signal lights (3) (4) having polarizations orthogonal to each other. Then, the two signal lights are combined with local oscillation lights (5, 6) having polarizations which are coincided with that of a corresponding one of the two signal lights. This results in the reduction of the number of polarization separating portions. |
