Managing latencies in data center interconnect switches using spare line side bandwidth and multiple paths inside the data center
Granted: March 12, 2019
Patent Number:
10230653
Systems, methods, and devices for managing latency in a network with a plurality of switches, each switch having client side ports and line side ports. A required bandwidth for each link between connected pairs of the plurality of switches is received. A client-side capacity value for each switch is received. An initial undersubscription factor is calculated based on the required bandwidths and the client-side capacity values. A desired undersubscription factor is calculated for each…
Nonlinear tolerant constant modulus multi-dimensional modulation formats for coherent optical communication systems
Granted: February 19, 2019
Patent Number:
10211928
Constant modulus multi-dimensional modulation system and methods are disclosed herein, employing multi-intensity quadrature amplitude modulation (QAM) to generate a dual-polarization symbol. j bits may be mapped to one of a plurality of dual-polarization symbols having a same constant power modulus on a two-level constellation including first and second intensity rings in a four-dimensional (4D) space including in-phase (I), quadrature (Q), X polarization (Xpol) and Y polarization…
Hybrid optical transmitter and/or receiver structure
Granted: February 19, 2019
Patent Number:
10211925
A device may include a substrate. The device may include a carrier mounted to the substrate. The device may include a transmitter photonic integrated circuit (PIC) mounted on the carrier. The transmitter PIC may include a plurality of lasers that generate an optical signal when a voltage or current is applied to one of the plurality of lasers. The device may include a first microelectromechanical structure (MEMS) mounted to the substrate. The first MEMS may include a first set of lenses.…
Tunable waveguide devices
Granted: February 12, 2019
Patent Number:
10205301
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
Metastability error correction methods and circuits for asynchronous successive approximation analog to digital converter (SAR ADC)
Granted: January 22, 2019
Patent Number:
10187079
Methods and apparatuses are described herein for metastability error detection and correction in analog-to-digital converters (ADCs). For example, an ADC may comprise a comparator, a register circuit, a first circuit, and a second circuit. The comparator may generate a comparator output signal in response to a sampling clock signal. The register circuit, operatively coupled to the comparator, may process the comparator output signal. The first circuit, operatively coupled to the…
Tunable waveguide devices
Granted: January 15, 2019
Patent Number:
10181698
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
Tunable waveguide devices
Granted: January 15, 2019
Patent Number:
10181697
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
Photonic integrated circuit
Granted: January 15, 2019
Patent Number:
10181696
Methods, systems, and apparatus, including an optical receiver including a laser including a gain section; and a first tunable reflector configured to output a reference signal; a first coupler formed over the substrate; a shutter variable optical attenuator formed over the substrate, the shutter variable optical attenuator including an input port configured to receive the first portion of the reference signal from the laser; and an output port configured to provide or to block, based on…
Low-cost nano-heat pipe
Granted: January 8, 2019
Patent Number:
10175005
A method of fabricating a heat pipe may include providing a first material as a body section. The method may include stamping or etching the body section to include the cavity. A portion of the body section may constitute a wall of the cavity. The method may include stamping or etching the wall of the cavity to provide a set of corrugations on a portion of the wall of the cavity. The method may include forming an opening in the wall of the cavity. The method may include attaching a lid…
Tunable waveguide devices
Granted: January 8, 2019
Patent Number:
10177531
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
Digital link viewer for data center interconnect nodes
Granted: December 11, 2018
Patent Number:
10153861
A device may receive optical network information associated with a first optical node and a second optical node. The first optical node may be associated with a first group of optical devices. The second optical node may be associated with a second group of optical devices. The device may identify a first mapping in which a first group of optical channels is associated with the first group of optical devices and a second mapping in which a second group of optical channels is associated…
Optical network laser auto-tuning methods and systems
Granted: December 4, 2018
Patent Number:
10148382
Methods and systems are disclosed including a system comprising a first node, having a first transceiver comprising a first receiver and a first transmitter, comprising a tunable laser, configured to transmit a first optical signal on a first channel and to transmit a second optical signal on a second channel if the first receiver does not detect a third optical signal; a second node having a second transceiver comprising a second receiver and a second transmitter configured to transmit…
Mach-Zehnder interferometer having bended waveguides
Granted: November 20, 2018
Patent Number:
10133141
Consistent with the present disclosure, both arms of an MZ interferometer are “double-folded” and are bent in at least two locations to define first and second acute inner angles. Accordingly, the arms of the MZ interferometer may have substantially the same length, and, further, the MZ interferometer has a more compact geometry. In one example, the arms parallel each other and have a serpentine shape, and, in a further embodiment, the arms parallel one another and have a Z-shape.…
Generic SerDes tuning module
Granted: November 13, 2018
Patent Number:
10128892
Systems and methods of tuning SerDes links between transmitter SerDes channels and receiver SerDes channels are described. Generally, the SerDes links may be tuned using a generic SerDes tuner implementation and a tuning algorithm. The tuning algorithm may have a first tuner interface specific to the transmitter SerDes device and a second tuner interface specific to the receiver SerDes device. The tuning algorithm may define a sequence of operations from the first tuner interface and the…
Tunable waveguide devices
Granted: November 6, 2018
Patent Number:
10122149
Methods, systems, and apparatus, including a laser including a layer having first and second regions, the first region including a void; a mirror section provided on the layer, the mirror section including a waveguide core, at least part of the waveguide core is provided over at least a portion of the void; a first grating provided on the waveguide core; a first cladding layer provided between the layer and the waveguide core and supported by the second region of the layer; a second…
Method and system for asynchronous clock generation for successive approximation analog-to-digital converter (SAR ADC)
Granted: October 30, 2018
Patent Number:
10116318
A method and apparatus are disclosed for asynchronous clock generation in analog-to-digital converters (ADCs). For example, an ADC may comprise a comparator, a first logic gate, a second logic gate, a first memory element, a second memory element, and a digital-to-analog converter (DAC). The comparator may initiate an evaluation or precharge operation of comparator inputs. The first logic gate may generate, based on comparator outputs, a first output signal indicating validity of first…
Systems, apparatus, and methods for packetized clocks
Granted: October 16, 2018
Patent Number:
10103869
Systems, apparatus, and methods for packetized clocks may include a packet interface to carry the rate of a client to a sigma-delta modulator that generates a clock at the required rate inside the chip itself there by removing the need for off-chip analog PLLs. The packetized clock may include a packet interface that receives a flow credit packet that includes a plurality of flow credit counts, one flow credit count for each data flow, and forwards a flow credit count for each data flow…
Systems, apparatus, and methods for segment routing of optical signals
Granted: October 9, 2018
Patent Number:
10097909
A packet optical network may include a packet optical gateway node that is configured to advertise a segment label to other nodes in the network where the segment label is used by a source node in place of a conventional segment routing label when the source node generates the list of labels included in the header of a data packet while establishing a path through a network. The segment label differs from a conventional segment routing label in that the segment label indicates the L0/L1…
Methodology for unit test and regression framework
Granted: October 9, 2018
Patent Number:
10095611
Disclosures herein describe a record and replay regression and unit test automation framework for simulating any hardware on a virtual machine to achieve thorough, affordable and efficient software testing. According to the disclosures herein, the test automation framework includes a recording stage where input and output messages for all the interfaces for a process (e.g., an embedded system or any software system or process) running on the original hardware may be recorded along with…
Interface card cooling using heat pipes
Granted: October 2, 2018
Patent Number:
10091911
A device may have: a frame section having a cage with a first receiving portion and a second receiving portion, the second receiving portion receiving a module; a first plate having an end, the first plate being received by the first receiving portion; a heat pipe having a first end attached to the end of the first plate and having a second end; a second plate attached to the second end of the heat pipe; and a spring attached to the first plate to bias the first plate against the module,…
