Abstract: An optical circuit includes a resonator including a nonlinear optical material having intensity-dependent absorption, an input, and an output. The optical circuit includes an optical input path coupled to the input of the resonator and provides an optical logic input, an optical reference path coherently coupled to the resonator and configured to provide a first reference signal coupled to the optical input path and a second reference signal, and an optical output path coupled to the output of the resonator and configured to receive the second reference signal. The resonator receives a combined version of the optical logic input and the first reference signal, and provides an optical output signal based on the optical logic input, the first reference signal, and an intensity threshold of the nonlinear optical material. The optical output path provides an optical logic output corresponding to an output logic state based on the optical output signal and the second reference signal.

Abstract: An acousto-optic device employing strong interband coupling in a multi-mode, spiral-shaped optomechanical waveguide is disclosed. The acousto-optic device includes multiple interdigitated transducers to produce phonons, which are directed to the optomechanical waveguide at an angle. By confining the produced phonons to the optomechanical waveguide, using phonon confining elements and/or a suspended structure, the interband coupling is increased. Through the use of spatial mode multiplexers at either end of the optomechanical waveguide to block or pass different spatial optical modes, one can create an acousto-optic modulator or an optical isolator.

Abstract: A system and method for satellite imaging are provided. The system includes a first satellite, a trailing satellite, and a ground terminal. The first satellite acquires synthetic aperture radar (SAR) image data in a first predetermined signal frequency band at a first imaging location and transmits the SAR image data to a ground terminal. The ground terminal determines a second imaging location from the SAR image data and transmits the second imaging location to the trailing satellite. The trailing satellite acquires higher resolution image data in a second predetermined signal frequency band at the second imaging location and transmits the image data to the ground terminal. Systems and methods for satellite imaging are also provided in which a first satellite captures image data and processes the image data onboard to generate a processed product which is transmitted to a receiving terminal at a ground terminal or on a second satellite.

Abstract: Techniques and systems for adaptive optimization of clusters for bitrate prediction are disclosed. In some embodiments, such techniques may include extracting, in real-time, features from content segments of a video stream; identifying superclusters representing optimal bitrates for the content segments of the live video stream based on a mapping of the features to superclusters generated by one or more trained machine learning models, the identified superclusters configured to maintain a quality level associated with the content segments; assigning a subcluster between the identified superclusters; and applying bitrates associated with the identified superclusters and the subcluster to the video stream.

Abstract: An orchestration system of or otherwise available to a web platform centralizes the execution of workflow components of a workflow associated with a job posting hosted by the web platform using various software services internal and/or external to the web platform. The workflow components and attributes thereof are determined based on the job posting. Domain-specific language (DSL) instructions for the various workflow components are generated. First DSL instructions are invoked by the orchestration system to cause an execution of a first workflow component of the workflow by a first software service. The orchestration system obtains an output of the first workflow component, such as values of relevant attributes, and, based on the output and in some cases information derived other than from the first workflow component, invokes next DSL instructions to cause an execution of a next workflow component of the workflow by another software service.

Abstract: Techniques and systems for adaptive bitrate optimization for live content delivery are disclosed. In some embodiments, such techniques may include extracting, in real-time, features from content segments of a video stream; for each content segment of the video stream, identifying a rate-distortion (RD) cluster from a mapping of extracted features to RD clusters using one or more trained machine learning models; and transcoding the video stream by applying, to the content segments, a transcoding ladder having bitrate information corresponding to each identified RD cluster.

Abstract: An optical circuit includes a resonator including a nonlinear optical material having intensity-dependent absorption, an input, and an output. The optical circuit includes an optical input path coupled to the input of the resonator and provides an optical logic input, an optical reference path coherently coupled to the resonator and configured to provide a first reference signal coupled to the optical input path and a second reference signal, and an optical output path coupled to the output of the resonator and configured to receive the second reference signal. The resonator receives a combined version of the optical logic input and the first reference signal, and provides an optical output signal based on the optical logic input, the first reference signal, and an intensity threshold of the nonlinear optical material. The optical output path provides an optical logic output corresponding to an output logic state based on the optical output signal and the second reference signal.

Abstract: In some aspects, the techniques described herein relate to a method including: receiving a request from a client device to join a room, the room associate with a plurality of other client devices streaming multimedia content; adding the client device to the room in response to the request; computing a synchronization time for the client based on time values associated with the client device and the other client devices; and transmitting the synchronization time to the client device, causing the client device to adjust playback of the multimedia content based on the synchronization time.

Abstract: An orchestration system of or otherwise available to a web platform centralizes the execution of workflow components of a workflow associated with a job posting hosted by the web platform using various software services internal and/or external to the web platform. The workflow components and attributes thereof are determined based on the job posting. Domain-specific language (DSL) instructions for the various workflow components are generated. First DSL instructions are invoked by the orchestration system to cause an execution of a first workflow component of the workflow by a first software service. The orchestration system obtains an output of the first workflow component, such as values of relevant attributes, and, based on the output and in some cases information derived other than from the first workflow component, invokes next DSL instructions to cause an execution of a next workflow component of the workflow by another software service.

Abstract: A system and method for satellite imaging are provided. The system includes a first satellite, a trailing satellite, and a ground terminal. The first satellite acquires synthetic aperture radar (SAR) image data in a first predetermined signal frequency band at a first imaging location and transmits the SAR image data to a ground terminal. The ground terminal determines a second imaging location from the SAR image data and transmits the second imaging location to the trailing satellite. The trailing satellite acquires higher resolution image data in a second predetermined signal frequency band at the second imaging location and transmits the image data to the ground terminal. Systems and methods for satellite imaging are also provided in which a first satellite captures image data and processes the image data onboard to generate a processed product which is transmitted to a receiving terminal at a ground terminal or on a second satellite.

Abstract: An epitaxial structure includes a semiconductor substrate, a dislocation blocking layer; and one or more active layers.

Abstract: In some aspects, the techniques described herein relate to a method including: receiving a request from a client device to join a room, the room associate with a plurality of other client devices streaming multimedia content; adding the client device to the room in response to the request; computing a synchronization time for the client based on time values associated with the client device and the other client devices; and transmitting the synchronization time to the client device, causing the client device to adjust playback of the multimedia content based on the synchronization time.

Abstract: The disclosed embodiments describe methods, devices, systems, and computer-readable media for synchronizing streamlining multimedia files among client devices. In the various embodiments, multiple client devices are configured to adjust playback of live multimedia content to synchronize playback in combination with a video conference.

Abstract: The disclosed embodiments describe methods, devices, systems, and computer-readable media for synchronizing streamlining multimedia files among client devices. In the various embodiments, multiple client devices are configured to adjust playback of live multimedia content to synchronize playback in combination with a video conference.

Abstract: There is set forth herein a method including a substrate; a dielectric stack disposed on the substrate; one or more photonics device integrated in the dielectric stack; and a laser light source having a laser stack including a plurality of structures arranged in a stack, wherein structures of the plurality of structures are integrated in the dielectric stack, wherein the laser stack includes an active region configured to emit light in response to the application of electrical energy to the laser stack.

Abstract: An epitaxial structure includes a semiconductor substrate, a dislocation blocking layer; and one or more active layers.

Abstract: A silicon-photonic integrated circuit comprising a direct-bandgap-semiconductor-based active optical device that is epitaxially grown on an indirect-bandgap SOI substrate (108) is disclosed. The structure of the active optical device includes an active region (120) having quantum dots (206) made of InGaAs that are embedded in one or more confinement layers (n-InP, p-InP), where the bandgap of the confinement layers is higher than that of the quantum dots. Further the confinement-layer material is preferably lattice matched to the quantum dot material in order to suppress associated crystalline defects within the material are located away from the center of its bandgap such that they suppress recombination-enhanced defect-reaction-driven degradation of the active optical device.

Abstract: A light emitting device includes a unipolar light emitter structured from materials arranged to provide light emission via intersubband transitions of a single type of carrier in either of the conduction band or valence band integrated with a foreign surface.

Abstract: There is set forth herein a method including a substrate; a dielectric stack disposed on the substrate; one or more photonics device integrated in the dielectric stack; and a laser light source having a laser stack including a plurality of structures arranged in a stack, wherein structures of the plurality of structures are integrated in the dielectric stack, wherein the laser stack includes an active region configured to emit light in response to the application of electrical energy to the laser stack.

Abstract: A silicon-photonic integrated circuit comprising a direct-bandgap-semiconductor-based active optical device that is epitaxially grown on an indirect-bandgap SOI substrate (108) is disclosed. The structure of the active optical device includes an active region (120) having quantum dots (206) made of InGaAs that are embedded in one or more confinement layers (n-InP, p-InP), where the bandgap of the confinement layers is higher than that of the quantum dots. Further the confinement-layer material is preferably lattice matched to the quantom dot material in order to supress associated crystalline defects within the material are located away from the center of its bandgap such that they suppress recombination-enhanced defect-reaction-driven degradation of the active optical device.