Abstract: A system can include a unit cell of a ring modulator of a coarse wavelength division multiplexing (CWDM) optical link. The unit cell includes a ring resonator including a ring waveguide configured to receive, via a first bus waveguide, an optical signal, and modulate the optical signal to generate a modulated optical signal. The unit cell further includes a multiplexer, disposed between the first bus waveguide and a second bus waveguide, configured to filter the modulated optical signal.

Abstract: A system can include a unit cell of a ring modulator of a dense wavelength division multiplexing (DWDM) optical link. The unit cell includes a set of ring waveguides, each ring waveguide of the set of ring waveguides being configured to generate a portion of a modulated optical signal based on a portion of an optical signal received via a first bus waveguide. The unit cell further includes a multiplexer, operatively coupled to a second bus waveguide, configured to filter the portion of the modulated optical signal to generate a portion of a filtered optical signal.

Abstract: A point cloud encoding and decoding method including: obtaining encoding limit information that comprises a group quantity limit threshold; obtaining a transform coefficient sequence of point cloud points based on the encoding limit information, where the point cloud points are comprised in a point cloud group that has a quantity less than or equal to the group quantity limit threshold, and where the transform coefficient sequence is obtained by sorting transform coefficients of the point cloud points; and encoding the transform coefficient sequence to obtain a point cloud group bitstream that corresponds to the point cloud group.