A sourceless co-packaged optical-electrical chip can include a plurality of different optical transceivers, each of which can transmit to an external destination or internal components. Each of the transceivers can be configured for a different modulation format, such as different pulse amplitude, phase shift key, and quadrature amplitude modulation formats. Different light sources provide light for processing by the transceivers, where the light source and transceivers can be configured for different applications (e.g., different distances) and data rates. An optical coupler can combine the light for the different transceivers for input into the sourceless co-packaged optical-electrical chip via a polarization maintaining media (e.g., polarization maintaining few mode fiber and polarization maintaining single mode fiber), where another coupler operates in splitting mode to separate the different channels of light for the different transceivers according to different co-packaged configurations.

An optical receiver sub-assembly is provided, which includes a substrate, an optical waveguide device mounted on the substrate to transfer ray incident from a ray source, and a photodetector mounted on the substrate and disposed under a vertical cross-sectional surface of the optical waveguide device, wherein the ray is sequentially reflected and refracted by an upper slope surface and a lower slope surface provided in the vertical cross-sectional surface and is vertically incident on an active area of the photodetector.

An optical receiver sub-assembly is provided, which includes a substrate, an optical waveguide device mounted on the substrate to transfer ray incident from a ray source, and a photodetector mounted on the substrate and disposed under a vertical cross-sectional surface of the optical waveguide device, wherein the ray is sequentially reflected and refracted by an upper slope surface and a lower slope surface provided in the vertical cross-sectional surface and is vertically incident on an active area of the photodetector.

Systems and methods for optical data interconnection are described. One aspect includes detecting a first HDMI connection of a first terminal of an optical connector. A second HDMI connection of a second terminal of the optical connector may be detected. One aspect includes determining that the first HDMI connection is associated with an HDMI source, and determining that the second HDMI connection is associated with an HDMI sink. Responsive to determining that the first HDMI connection is associated with the HDMI source, an HDMI transmission mode is selected for the first terminal. Responsive to determining that the second HDMI connection is associated with the HDMI sink, an HDMI reception mode is selected for the second terminal. The first terminal and the second terminal may perform HDMI optical communication via an optical communication channel.

Systems and methods for optical data interconnection are described. One aspect includes detecting a first HDMI connection of a first terminal of an optical connector. A second HDMI connection of a second terminal of the optical connector may be detected. One aspect includes determining that the first HDMI connection is associated with an HDMI source, and determining that the second HDMI connection is associated with an HDMI sink. Responsive to determining that the first HDMI connection is associated with the HDMI source, an HDMI transmission mode is selected for the first terminal. Responsive to determining that the second HDMI connection is associated with the HDMI sink, an HDMI reception mode is selected for the second terminal. The first terminal and the second terminal may perform HDMI optical communication via an optical communication channel.

Systems of enhancing contrast of lighting can include a light-transmitting subsystem having a light source to emit a stream or light-signal pulses and an encoding circularly polarizing filter to optically encode the stream of light-signal pulses with circular polarization, and a light-receiving subsystem including a decoding circularly polarizing filter to optically decode the circular polarization of the stream of light-signal pulses and a light imager to receive the stream of light-signal pulses after being optically decoded by the decoding circularly polarizing filter. In another example, the system can include a polarimetric light imaging assembly, a light source to generate a stream of light-signal pulses directed at the polarimetric light imaging assembly, and a control system to synchronously control the light-signal pulses to be emitted from the light source in timed correlation with a component(s) of the polarimetric light imaging assembly.

Systems of enhancing contrast of lighting can include a light-transmitting subsystem having a light source to emit a stream or light-signal pulses and an encoding circularly polarizing filter to optically encode the stream of light-signal pulses with circular polarization, and a light-receiving subsystem including a decoding circularly polarizing filter to optically decode the circular polarization of the stream of light-signal pulses and a light imager to receive the stream of light-signal pulses after being optically decoded by the decoding circularly polarizing filter. In another example, the system can include a polarimetric light imaging assembly, a light source to generate a stream of light-signal pulses directed at the polarimetric light imaging assembly, and a control system to synchronously control the light-signal pulses to be emitted from the light source in timed correlation with a component(s) of the polarimetric light imaging assembly.

A photonic system enabling the processing of high frequency microwave, mm-wave, THz signals or other RF signals. The processing may include, e.g., adjusting the frequency, quadrature, and/or power of the signals. In illustrative examples, the system uses a polychromatic light source producing at least two low noise optical emission frequencies that can be independently tuned in a broad frequency range and/or modulated in a broad frequency range using external modulators. An RF input signal is upconverted to one of the optical harmonics of the modulated polychromatic source, processed in the optical frequency domain, and downconverted to the RF domain (at the same or a different RF carrier frequency). The photonic system can be integrated on a planar optical substrate, such as a photonic integrated circuit (PIC). Optical local oscillators are also described for use in the photonic system or for other purposes. Various system, device, and method examples are provided.

A photonic system enabling the processing of high frequency microwave, mm-wave, THz signals or other RF signals. The processing may include, e.g., adjusting the frequency, quadrature, and/or power of the signals. In illustrative examples, the system uses a polychromatic light source producing at least two low noise optical emission frequencies that can be independently tuned in a broad frequency range and/or modulated in a broad frequency range using external modulators. An RF input signal is upconverted to one of the optical harmonics of the modulated polychromatic source, processed in the optical frequency domain, and downconverted to the RF domain (at the same or a different RF carrier frequency). The photonic system can be integrated on a planar optical substrate, such as a photonic integrated circuit (PIC). Optical local oscillators are also described for use in the photonic system or for other purposes. Various system, device, and method examples are provided.

An optical signal processing apparatus includes a removal unit and a superimposition unit. The removal unit receives, from a first optical transmission path, an optical signal converted from an electrical signal, in which a first signal and a second signal having different frequencies from each other have been superimposed, and removes the second signal from the optical signal which has been input. The superimposition unit superimposes a third signal having a frequency different from a frequency of the first signal on the optical signal in which the second signal has been removed by the removal unit, and outputs the optical signal in which the third signal has been superimposed to a second optical transmission path.