Space switch device

1. A spatial switching apparatus having a plurality of input terminals, an input optical signal of a single wavelength being input to each of the plurality of the input terminals, and a plurality of output terminals, an output optical signal of a single wavelength being output from each of the plurality of the output terminals, comprising:

a signal wavelength converting portion having an electric signal converting element converting the input optical signal into an electric signal, and a variable wavelength laser, the signal wavelength converting portion using the variable wavelength laser to convert the electric signal converted by the electric signal converting element into an optical signal of an arbitrary wavelength; and

a spatial switching portion having a plurality of first cyclic arrayed waveguide gratings (AWGs) performing output from a plurality of output ports respectively corresponding to wavelengths of a plurality of arrayed waveguide grating input signals input from the variable wavelength laser, and a plurality of second cyclic arrayed waveguide gratings having a same total number of input ports as a total number of the plurality of the output ports of the plurality of the first cyclic arrayed waveguide gratings, the spatial switching portion routing and outputting the arrayed waveguide grating input signal from one of a plurality of output ports of the second cyclic arrayed waveguide gratings, the one output port corresponding to a wavelength of the arrayed waveguide grating input signal,

wherein each one of the first cyclic waveguide gratings is connected to each of the second cyclic arrayed waveguide gratings,

a number of input ports and a number of output ports each of first cyclic arrayed waveguide gratings are the same, and a number of input ports and a number of output ports of each of the second cyclic arrayed waveguide gratings are the same,

a number of output ports of each of the first cyclic arrayed waveguide gratings and a number of input ports of each of the second cyclic arrayed waveguide gratings are relatively prime to each other, and

a number of input/output ports of each of the second cyclic arrayed waveguide gratings and a number of the input/output ports of each of the second cyclic arrayed waveguide gratings are different numbers to each other.

2. The spatial switching apparatus of claim 1 , further comprising:

n−1 additional spatial switching portions,

wherein 1×n optical switches are disposed between the signal wavelength converting portion and the n spatial switching portions.

3. The spatial switching apparatus of claim 2 , wherein an m×1 optical combiner is disposed between the 1×n optical switches and the first cyclic arrayed waveguide gratings, and wherein the m×1 optical combiner multiplexes and inputs output signals of m 1×n optical switches to one input port of one of the first cyclic arrayed waveguide gratings.

4. A spatial switching apparatus having a plurality of input terminals, an input optical signal of a single wavelength being input to each of the plurality of the input terminals, and a plurality of output terminals, an output optical signal of a single wavelength being output from each of the plurality of the output terminals, comprising:

a signal wavelength converting portion having an electric signal converting element converting the input optical signal into an electric signal, and a variable wavelength laser, the signal wavelength converting portion using the variable wavelength laser to convert the electric signal converted by the electric signal converting element into an optical signal of an arbitrary wavelength; and

a spatial switching portion having a plurality of first cyclic arrayed waveguide gratings (AWGs) performing output from a plurality of output ports respectively corresponding to wavelengths of a plurality of arrayed waveguide grating input signals input from the variable wavelength laser, and a plurality of second cyclic arrayed waveguide gratings having a same total number of input ports as a total number of the plurality of the output ports of the plurality of the first cyclic arrayed waveguide gratings, the spatial switching portion routing and outputting the arrayed waveguide grating input signal from one of a plurality of output ports of the second cyclic arrayed waveguide gratings, the one output port corresponding to a wavelength of the arrayed waveguide grating input signal,

wherein each one of the first cyclic arrayed waveguide gratings is connected to each of the second cyclic arrayed waveguides gratings,

a number of the input ports and a number of the output ports of each of the first cyclic arrayed waveguide gratings are the same, and a number of the input ports and a number of the output ports of each of the second cyclic arrayed waveguide gratings are the same,

a number of input/output ports of each of the first cyclic arrayed waveguide gratings and a number of input/output ports of each of the second cyclic arrayed waveguide gratings have a common factor to each other,

a number of input/output ports of the first cyclic arrayed waveguide gratings and a number of the input/output ports of each of the second cyclic arrayed waveguide gratings are different numbers to each other,

1×n optical switches are disposed between the signal wavelength converting portion and the spatial switching portion,

and n is a same number as the common factor.

5. The spatial switching apparatus of claim 4 , wherein an m×1 optical combiner is disposed between the 1×n optical switches and the first cyclic arrayed waveguide gratings, and wherein the m×1 optical combiner multiplexes and inputs output signals of m 1×n optical switches to one input port of one of the first cyclic arrayed waveguide gratings.

6. The spatial switching apparatus of claim 5 , wherein n and m are equal in the spatial switching apparatus.