Optical switching apparatus, redirection method, reconfigurable optical add/drop multiplexer, and system

An optical switching apparatus comprising:

• a dispersion component;
• a first filter;
• a redirection component comprising:
• a first area;
• and
• a second area, wherein the first area and the second area are separated from each other in a first direction, and wherein the first direction is a port direction of the redirection component;
• input ports configured to enable a first beam and a second beam to be incident onto the first filter, wherein the first beam and the second beam belong to different bands,
• wherein the first filter is configured to:
• separate transmission directions of the first beam and the second beam into different transmission directions in the first direction based on the different bands;
• and
• transmit the first beam and the second beam to the dispersion component,
• wherein the dispersion component is configured to:
• decompose the first beam into a plurality of first sub-beams;
• decompose the second beam into a plurality of second sub-beams;
• and
• enable the first sub-beams and the second sub-beams to be incident onto the redirection component, wherein the first sub-beams are incident onto the first area, wherein the second sub-beams are incident onto the second area,
• wherein the redirection component is configured to:
• perform redirection on the first sub-beams to obtain a plurality of redirected first sub-beams;
• and
• perform redirection on the second sub-beams to obtain a plurality of redirected second sub-beams;
• an output port configured to output the redirected first sub-beams and the redirected second sub-beams;
• a first reflector configured to:
• receive the first sub-beams from the first filter;
• and
• transmit the first sub-beams to the redirection component;
• and
• a second reflector configured to:
• receive the second sub-beams from the first filter;
• and
• transmit the second sub-beams to the redirection component.

A redirection method implemented by an optical switching apparatus, wherein the redirection method comprises:

• enabling, using input ports of the optical switching apparatus, a first beam and a second beam to be incident onto a dispersion component of the optical switching apparatus;
• decomposing, using the dispersion component, the first beam into a first sub-beams;
• decomposing, using the dispersion component, the second beam into a second sub-beams;
• transmitting, using the dispersion component, the first sub-beams and the second sub-beams to a filter of the optical switching apparatus, wherein the first sub-beams and the second sub-beams belong to different bands;
• separating, using the filter, transmission directions of the first sub-beams and the second sub-beams into different transmission directions in a first direction based on the different bands;
• enabling, using the filter, the first sub-beams to be incident onto a first area of a redirection component of the optical switching apparatus;
• enabling, using the filter, the second sub-beams to be incident onto a second area of the redirection component, wherein the first area and the second area are separated from each other in the first direction, and wherein the first direction is a port direction of the redirection component;
• performing, using the redirection component, redirection on the first sub-beams to obtain a plurality of redirected first sub-beams;
• performing, using the redirection component, redirection on the second sub-beams to obtain a plurality of redirected second sub-beams;
• and
• outputting, using an output port of the optical switching apparatus, the redirected first sub-beams and the redirected second sub-beams.