Optical signal processing device

An optical signal processing device, comprising:

• M input ports (where M is an integer of 2 or more);
• a first spatial beam transformer that emits optical signals inputted to the M input ports, from a single point of an output end in directions different for the respective input ports;
• a deflector capable of deflecting optical signals emitted from the first spatial beam transformer according to which of incident regions on the deflector the optical signals have been incident on;
• N second spatial beam transformers (where N is an integer of 2 or more) that each demultiplex an optical signal emitted from the deflector into M waveguides according to an angle of incidence;
• N or less optical multiplex units that each selects an optical signal emitted from at least one of the M waveguides of each of the second spatial beam transformers and output the selected optical signal from a single output port,
• a wavelength disperser disposed between the first spatial beam transformer and the deflector, and
• the optical signals subjected to wavelength demultiplexing by the wavelength disperser are incident on different regions on the deflector according to their respective wavelengths.

An optical signal processing device, comprising:

• M first input/output ports (where M is an integer of 2 or more);
• a first spatial beam transformer that includes M second input/output ports connected to the M first input ports and a first input/output terminal that emits optical signals from a single point of an output end in directions different for the respective second input/output ports;
• N second spatial beam transformers (where N is an integer of 2 or more) that each include M third input/output ports and a second input/output terminal that emits optical signals in directions different for the respective third input/output ports;
• N or less optical multiplex/demultiplex units that each include fourth input/output ports connected to the M third input/output ports of a corresponding one of the second spatial beam transformer and one fifth input/output port;
• a deflector capable of deflecting optical signals emitted from the first input/output terminal of the first spatial beam transformer and the second input/output terminal of each of the second spatial beam transformers according to which of incident regions on the deflector the optical signals have been incident on, and capable of optically connecting the first spatial beam transformer and the second spatial beam transformers to each other,
• a wavelength disperser disposed between the first spatial beam transformation means and the deflector, and
• the optical signals subjected to wavelength demultiplexing by the wavelength disperser are incident on different regions on the deflector according to their respective wavelengths.