Patent ID: 11909513
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G  H

Claim 11:
12. A reconfigurable optical add-drop multiplexer (ROADM), comprising a transmitter, a receiver, and an apparatus, wherein
the transmitter is configured to add a first local optical wavelength signal to a port assembly of the apparatus;
the receiver is configured to drop a second local optical wavelength signal from the port assembly of the apparatus; and
the apparatus comprises:
the port assembly, a lens assembly, a dispersive assembly, a spatial light modulator (SLM), and a reflective element, wherein the port assembly comprises N ports, and the lens assembly comprises M lenses, wherein the M lenses are zoom lenses, wherein N is an integer greater than 1, and M is an integer greater than or equal to 1 and less than or equal to N; and

wherein:
each port in the port assembly is configured to transmit an input first light beam to a lens in the lens assembly corresponding to the respective port in the port assembly;
each lens in the lens assembly is configured to adjust a width of the first light beam to obtain a second light beam, and transmit the second light beam to the reflective element;
the reflective element is configured to reflect each second light beam to the dispersive assembly;
the dispersive assembly is configured to decompose each second light beam into a plurality of sub-wavelength light beams, and transmit each plurality of sub-wavelength light beams to the reflective element;
the reflective element is further configured to reflect each plurality of sub-wavelength light beams to the SLM;
the SLM is configured to modulate each plurality of sub-wavelength light beams, and reflect at least one modulated sub-wavelength light beam to the reflective element;
the reflective element is further configured to reflect the at least one modulated sub-wavelength light beam to the dispersive assembly; and
the dispersive assembly is further configured to multiplex the at least one modulated sub-wavelength light beam, and transmit a multiplexed light beam to the port assembly through the reflective element and the lens assembly.