An optical communications apparatus, comprising: a first input component, a first wavelength dispersion component, a second wavelength dispersion component, a third wavelength dispersion component, an optical deflection component, a second optical switch array, a third optical switch array, a first output component, and a second output component, wherein the first input component is configured to input a first light beam and propagate the first light beam to the first wavelength dispersion component; the first wavelength dispersion component is configured to decompose the first light beam incident from the first input component into a plurality of first sub-wavelength light beams, and propagate the plurality of first sub-wavelength light beams to the optical deflection component; the optical deflection component is configured to perform angle deflection on the plurality of first sub-wavelength light beams to obtain a plurality of second sub-wavelength light beams, and propagate the plurality of second sub-wavelength light beams to the second optical switch array; and the optical deflection component is further configured to perform angle deflection on the plurality of first sub-wavelength light beams to obtain a plurality of third sub-wavelength light beams, and propagate the plurality of third sub-wavelength light beams to the second wavelength dispersion component, wherein a light beam propagation direction of the second sub-wavelength light beam is different from that of the third sub-wavelength light beam; the second optical switch array is configured to propagate the plurality of second sub-wavelength light beams to the third wavelength dispersion component; the third wavelength dispersion component is configured to combine the plurality of second sub-wavelength light beams into a second light beam, and propagate the second light beam to the first output component; the first output component is configured to output the second light beam to different directions; the second wavelength dispersion component is configured to combine the plurality of third sub-wavelength light beams into a third light beam, and propagate the third light beam to the third optical switch array; the third optical switch array is configured to propagate the third light beam to the second output component; and the second output component is configured to output the third light beam to drop a signal; wherein the first wavelength dispersion component, the second wavelength dispersion component and the third wavelength dispersion component operate on a same wavelength plane. a first input component, a first wavelength dispersion component, a second wavelength dispersion component, a third wavelength dispersion component, an optical deflection component, a second optical switch array, a third optical switch array, a first output component, and a second output component, wherein the first input component is configured to input a first light beam and propagate the first light beam to the first wavelength dispersion component; the first wavelength dispersion component is configured to decompose the first light beam incident from the first input component into a plurality of first sub-wavelength light beams, and propagate the plurality of first sub-wavelength light beams to the optical deflection component; the optical deflection component is configured to perform angle deflection on the plurality of first sub-wavelength light beams to obtain a plurality of second sub-wavelength light beams, and propagate the plurality of second sub-wavelength light beams to the second optical switch array; and the optical deflection component is further configured to perform angle deflection on the plurality of first sub-wavelength light beams to obtain a plurality of third sub-wavelength light beams, and propagate the plurality of third sub-wavelength light beams to the second wavelength dispersion component, wherein a light beam propagation direction of the second sub-wavelength light beam is different from that of the third sub-wavelength light beam; the second optical switch array is configured to propagate the plurality of second sub-wavelength light beams to the third wavelength dispersion component; the third wavelength dispersion component is configured to combine the plurality of second sub-wavelength light beams into a second light beam, and propagate the second light beam to the first output component; the first output component is configured to output the second light beam to different directions; the second wavelength dispersion component is configured to combine the plurality of third sub-wavelength light beams into a third light beam, and propagate the third light beam to the third optical switch array; the third optical switch array is configured to propagate the third light beam to the second output component; and the second output component is configured to output the third light beam to drop a signal; wherein the first wavelength dispersion component, the second wavelength dispersion component and the third wavelength dispersion component operate on a same wavelength plane.