A photonic integrated circuit includes a photonic device. The photonic device includes an input region configured to receive an input signal including a plurality of multiplexed channels. The photonic device includes a metastructured dispersive region structured to partially demultiplex the input signal into an output signal and a throughput signal. The output signal includes a channel of the multiplexed channels. The throughput signal includes the remaining channels of the multiplexed channels. The photonic device includes an output region and a throughput region optically coupled with the metastructured dispersive region to receive the output signal and the throughput signal, respectively. The metastructured dispersive region includes a heterogeneous distribution of a first material and a second material that structures the metastructured dispersive region to partially demultiplex the input signal into the output signal and the throughput signal.

A demultiplexer for use in a wavelength division multiplexed system. The demultiplexer comprises: an input waveguide, configured to receive a wavelength division multiplexed signal; a demultiplexing element, configured to demultiplex the multiplexed signal received from the input waveguide into a plurality of multi-mode demultiplexed signal components; a multi-mode output waveguide, the multi-mode output waveguide being coupled to the demultiplexing element and configured to receive one of the multi-mode demultiplexed signal components; and a splitter, coupled to the multi-mode output waveguide, and configured to split the received multi-mode demultiplexed signal component into two single-mode outputs.

Example gratings, grating characteristic adjustment methods and devices are provided. One example grating includes a first optical waveguide region, a second optical waveguide region, and an arrayed waveguide region comprising a plurality of optical waveguides, where the first optical waveguide region is connected to the arrayed waveguide region, and the second optical waveguide region is connected to the arrayed waveguide region. The grating has at least one of the following characteristics: a refractive index of an optical waveguide in the first optical waveguide region can be changed, a refractive index of an optical waveguide in the second optical waveguide region can be changed, a refractive index of an optical waveguide in the arrayed waveguide region can be changed, or an optical waveguide in an arrayed waveguide region can be eliminated.

In at least one embodiment, the optoelectronic semiconductor device comprises a carrier, a first semiconductor laser configured to emit a first laser radiation and applied on the carrier, and a multi-mode waveguide configured to guide the first laser radiation and also applied on the carrier, wherein the multi-mode waveguide comprises at least one furcation and a plurality of branches connected by the at least one furcation.

An optical system has a LIDAR chip that includes a switch configured to direct an outgoing LIDAR signal to one of multiple different alternate waveguides. The system also includes a redirection component configured to receive the outgoing LIDAR signal from any one of the alternate waveguides. The redirection component is also configured to redirect the received outgoing LIDAR signal such that a direction that the outgoing LIDAR signal travels away from the redirection component changes in response to changes in the alternate waveguide to which the optical switch directs the outgoing LIDAR signal.

A photonic module, comprising a first waveguide; a second waveguide, disposed on an opposing side of the first waveguide to a substrate; and, a coupling section. One of the first waveguide and the second waveguide is formed of crystalline silicon. The other of the first waveguide and the second waveguide is formed of amorphous silicon. The coupling section is configured to couple light between the first waveguide and the second waveguide. Such a silicon photonic module has enhanced coupling and transmission properties in contrast to conventional modules.

In one embodiment, a silicon photonic integrated circuit (PIC) includes a pair of Mach-Zehnder Interferometers (MZI) with a phase shifter to function as a 1x2 optical switches. On one path between the MZIs is a wavelength interleaver. The MZI switch can be controlled to either an all-pass mode or a by-pass mode, therefore setting configurable optical demultiplexing bandwidths to support dual 1.6 T FR8/800G FR4 network backward compatibility. The configurable multiplexer operates at set-and-forget mode for the entire operating temperature and the product’s lifetime.

Fabrication-tolerant on-chip multiplexers and demultiplexers are provides via a lattice filter interleaver configured to receive an input signal including a plurality of individual signals and to produce a first interleaved signal with a first subset of the plurality of individual signals and a second interleaved signal with a second subset of the plurality of individual signals; a first Bragg interleaver configured to receive the first interleaved signal and produce a first output signal including a first individual signal of the plurality of individual signals and a second output signal including a second individual signal of the plurality of individual signals; and a second Bragg interleaver configured to receive the second interleaved signal and produce a third output signal including a third individual signal of the plurality of individual signals and a fourth output signal including a fourth individual signal of the plurality of individual signals.

Arrayed waveguide gratings (AWGs) are important components in coarse wavelength divisional multiplexing (CWDM) and dense wavelength division multiplexing (DWDM). However, the waveguides forming the array must be separated by a distance large enough to suppress parasitic coupling between the adjacent waveguides and thus limiting reductions in device footprint and insertion loss between the input/output coupler regions and the central region comprising the arrayed waveguides. The inventors have established a design methodology allowing the waveguide separation to be reduced whilst limiting cross-coupling thereby allowing for reduced footprints and insertion loss.

Structures and methods for high speed interconnection in photonic systems are described herein. In one embodiment, a photonic device is disclosed. The photonic device includes: a substrate; a plurality of metal layers on the substrate; a photonic material layer comprising graphene over the plurality of metal layers; and an optical routing layer comprising a waveguide on the photonic material layer.