| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical signal processor ensuring less wavelength dependence of a transmission factor on incident light and capable of easily multiplexing a plurality of types of light having different wavelengths.SOLUTION: An optical signal processor comprises: Dfirst couplers each including D×Dfirst ports and D×Dsecond ports; and D×Dsecond couplers each including Dthird ports and Dfourth ports, the Dthird ports being connected to the respective second ports of each Dfirst coupler. Each first coupler includes: Dthird couplers each including Dfifth ports and Dsixth ports, the fifth ports being connected to the first ports or second ports; and Dfourth couplers each including Dseventh ports and Deighth ports, the Dseventh ports being connected to the sixth ports of the Dthird couplers, respectively, and the eight ports being connected to the second ports or first ports. |
