Hewlett Packard Enterprise Development LP

Mir Ashkan Seyedi

Marco Fiorentino

Raymond G Beausoleil

Geza Kurczveil

Kevin B Leigh

Chin-Hui Chen

Di Liang

Thomas Van Vaerenbergh

Luca Ramini

Michael Renne Ty Tan

Wayne V Sorin

Paul Kessler Rosenberg

Sagi Varghese Mathai

Terrel L Morris

Zhihong Huang

Jinsung Youn

Frank R Dropps

Steven J Dean

Jason Pelc

Xiaoge Zeng

David Kielpinski

Tsung Ching Huang

Peng Sun

Rui Wu

Nan Qi

Antoine Descos

Shuren Hu

Gabriel Joel Mendoza

A method for simulating a photodetector behavior includes: receiving an input waveform for an photodetector; receiving an input optical power and a reverse bias voltage for the photodetector; searching for, in a lookup-table library, model parameters for a photodetector behavior model based on the input optical power and the reverse bias voltage; and outputting a second waveform from the photodetector behavior model, where the second waveform is indicative of an electrical response of the photodetector receiving the input waveform.

Behavior model of photodetectors with a built-in lookup table

An optical logic gate decision-making circuit that combines non-linear materials, such as silicon nitride, on a silicon-on-insulator (SOI) substrate is described. Circuitry includes a ring cavity coupled to an input optical bus waveguide. The input optical bus waveguide receives an optical signal and passes the optical signal to the ring cavity. An electro-optical device, for instance a PN junction, is integrated within the ring cavity to modulate the optical signal such that an optical logic gate function is enabled. An output optical bus waveguide is also coupled to the ring cavity, which outputs the optical signal modified based on the optical logic gate function and based on a wavelength routing function. By using silicon nitride, the optical non-linearity of the materials enables an 'all-optical' logic gate. Thus, the optical logic gate decision-making circuit is suitable for all-optical circuits, and support ultrafast optical signal processing and enabling packet switching of data.

Optical logic gate decision-making circuit combining non-linear materials on SOI

An optical transceiver module includes a light source configured to emit light, a transmitter resonator configured to transmit light signals from the light source, a temperature sensor configured to detect temperatures of the transmitter resonator, and a controller circuit. The controller circuit is configured to obtain a first temperature variation value based on the detected temperatures, and encode the first temperature variation value via the transmitter resonator in an outgoing data stream.

Mitigation of temperature variations and crosstalk in silicon photonics interconnects

Systems, methods, and computer-readable media are described for performing link training to enable optical pass-through (OPT) capabilities of a network node. OPT capabilities may refer to on-chip wavelength routing for a multi-wavelength data input, whereby an intermediate node detects wavelengths that are intended for OPT and transparently passes the wavelengths through to downstream nodes. When executed at an intermediate network node, an OPT link training algorithm can result in the creation of one or more wavelength routing maps that associate wavelengths received on particular inputs to the node with particular outputs of the node. An intermediate node may generate a respective wavelength routing map for each transmit node from which it receives input data. The wavelength routing maps may together implement OPT capabilities at the intermediate node as each wavelength routing map may indicate the manner in which wavelengths are passed through the intermediate node for a given transmit node.

Optical pass-through link training

Embodiments of the present disclosure provide etch-variation tolerant optical coupling components and processes for making the same. An etch-variation tolerant geometry is determined for at least one waveguide of an optical coupling component (e.g., a directional coupler). The geometry is optimized such that each fabricated instance of an optical component design with the etch-variation tolerant geometry has substantially the same coupling ratio at any etch depth between a shallow etch depth and a deep etch depth.

Etch variation tolerant directional couplers

Examples described herein relate to an optical device having a photonic-crystal lattice structure. In some examples, the optical device may include a substrate having a photonic-crystal lattice structure. The optical device may further include an optical waveguide formed in the photonic-crystal lattice structure and a defect cavity formed in the photonic-crystal lattice structure and optically coupled to the optical waveguide. Furthermore, the optical device may include a refractive index tuning structure adjacent to the defect cavity in the photonic-crystal lattice structure.

Optical device having photonic-crystal lattice structure for optical interconnects

An optical transceiver module includes an optical transceiver and a controller. The optical transceiver has a ring filter configured to transmit optical signals from or receive optical signals for the optical transceiver module. The controller is configured to: detect a carrier frequency at the optical transceiver; detect a data signal frequency of data at the optical transceiver; determine a bit error rate of the data; and in response to determining that the bit error rate of the data is greater than a threshold, periodically vary a central wavelength of the ring filter at a frequency at least three orders slower than the data signal frequency.

Wavelength modulation for improved optical link bit error rate

Examples relate to a transmitter for transmitting an optical signal including multiple frequencies. The transmitter includes a waveguide to receive a multi-frequency optical signal and a plurality of resonators coupled to the waveguide. Each resonator of the plurality of resonators selectively filters an optical signal of a frequency from the multi-frequency optical signal. The transmitter includes an optical combiner coupled to the plurality of resonators to receive optical signals filtered by the plurality of resonators and generate an output optical signal including a heterodyne combination based on the optical signals received from the plurality of resonators.

Transmitting an optical signal including heterodyne combinations

Systems and methods are provided for zero-added latency communication between nodes over an optical fabric. In various embodiments, a photonic interface system is provided that comprises a plurality of optical routing elements and optical signal sources. Each node within a cluster is assigned an intra-cluster wavelength and an inter-cluster wavelength. All the nodes in a cluster are directly connected and each node in a cluster is directly connected to one node in each of the plurality of clusters. When an optical signal from a different cluster is received at a node serving as the cluster interface, the photonics interface system allows all wavelength signals other than the node's assigned wavelength to pass through and couple those signals to an intra-cluster transmission signal. Zero latency is added in rerouting the data through an intermediate node.

Zero added latency packet reroute via silicon photonics

One embodiment provides an optical encoder. The optical encoder includes an optical comb source to generate a multi-wavelength optical signal; a number of optical filters sequentially coupled to the optical comb source, with a respective optical filter being tunable to pass or block a particular wavelength of the multi-wavelength optical signal based on a corresponding bit value of a multi-bit search word; and a common output for the optical filters to output the filtered multi-wavelength optical signal, which encodes the multi-bit search word and can be used as an optical search signal for searching an optical content-addressable memory (CAM).

Optical comb source for content-addressable memory encoders

An photonic circuit includes a substrate, a plurality of first light waveguides disposed on the substrate, the first light waveguides extending in a first direction, a plurality of second light waveguides disposed on the substrate and extending in a second direction intersecting the first direction, and a plurality of first micro-ring resonators disposed on the substrate. Each of the first light waveguides has an intersection with each of the second light waveguides. Each of the intersections is provided with a first micro-ring resonator of the first micro-ring resonators. Each first micro-ring resonator is configured to route signals of a respective wavelength from one of the light waveguides at the intersection to another light waveguide at the intersection.

Dimensionally all-to-all connected network system using photonic crossbars and quad-node-loop routing

A photonic node includes a first circuit disposed on a first substrate and a second circuit disposed on a second substrate different from the first substrate. The first circuit is configured to route light signals originated from the photonic node to local nodes of a local group in which the photonic node is a member. The second circuit is configured to route light signals received from a node of an external group in which the photonic node is not a member, to one of the local nodes.

Multi-chip photonic node for scalable all-to-all connected fabrics

Examples include systems and methods for communicating temperature variation information of a transmitter resonator to a receiver resonator in an optical communication system. Some examples provide a transceiver module that includes a transmitter resonator to transmit optical signals emitted from a light source, a photodetector coupled to the transmitter resonator to detect the optical signals transmitted by the transmitter resonator and generate a photocurrent, and a controller to receive the photocurrent from the photodetector, determine temperature variation information of the transmitter resonator from the photocurrent, and encode the temperature variation information in an outgoing data stream transmitted via the transmitter resonator.

Optical communication systems and methods to communicate temperature variation information

A fiber loop includes a plurality of processors coupled to each other and a controller coupled to each of the plurality of processors. The controller is configured to: assign to each of the plurality of processors a number of wavelengths for interconnect communications between the plurality of processors; receive, from a first processor of the plurality of processors, a request for one or more additional wavelengths; determine whether an interconnect bandwidth utilization on the fiber loop is less than a threshold; and in response to determining that the interconnect bandwidth utilization on the fiber loop is less than the threshold, reassign, to the first processor, one or more wavelengths that are assigned to a second processor of the plurality of processors.

Dynamic bandwidth sharing on a fiber loop using silicon photonics

Examples include a photonic device including a photonic integrated circuit (PIC), an optical transceiver (OTRx) front-end circuitry integrated with the PIC, an electronic integrated circuit (EIC) and an interposer. The PIC and the EIC are disposed on the interposer. The EIC is electrically interconnected to the OTRx front-end circuitry in the PIC. Some examples include a method of fabricating a photonic device.

Growing community of inventors

Palo Alto, CA, United States of America

Mir Ashkan Seyedi