Coriant | Date: 2016-11-01
An optical device that includes means for thermal stabilization and control is described. The optical device can be a ring resonator, or another device that requires accurate control of the phase of the optical signal. In an example involving an optical resonator, a thermal stabilization system includes a temperature sensor, a control circuit, and a heater local to the resonator. The temperature sensor can be a bandgap temperature sensor formed of a pair of matched p/n junctions biased in operation at different junction currents.
Coriant | Date: 2016-10-18
A photonic interface for an electronic circuit is disclosed. The photonic interface includes a photonic integrated circuit having a modulator and a photodetector, and an optical fiber or fibers for optical communication with another optical circuit. A modulator driver chip may be mounted directly on the photonic integrated circuit. The optical fibers may be placed in v-grooves of a fiber support, which may include at least one lithographically defined alignment feature for optical alignment to the silicon photonic circuit.
Coriant | Date: 2016-11-10
Source-synchronous communications between networked devices can be hindered by differing clock rates and data interface formats among the devices. By implementing a plurality of clock converters, a data interface format of a transmitting device is converted to a data interface format compatible with a receiving device. The clock converters provide a clock signal based on the source-synchronous data clock, and having a phase controlled with respect to an associated data signal. As a result, data exchange between devices operating at different clock rates is made possible.
Coriant | Date: 2016-11-09
An optical modulator apparatus may include a plurality of segment drivers, each segment driver having a unique offset voltage and driving but a portion or a segment of an electro-optical modulator. A modulating electrical signal may be applied to the segment drivers via a plurality of electrical delays. Parameters of the segment drivers may be selected so as to approximate a pre-defined transfer function, which may include a linear or a non-linear transfer function.
Coriant | Date: 2015-11-12
A compact, low-loss and wavelength insensitive Y-junction for submicron silicon waveguides. The design was performed using FDTD and particle swarm optimization (PSO). The device was fabricated in a 248 nm CMOS line. Measured average insertion loss is 0.280.02 dB across an 8-inch wafer. The device footprint is less than 1.2 m2 m, orders of magnitude smaller than MMI and directional couplers.
Coriant | Date: 2015-11-10
A hybrid pin connecting apparatus and method for connecting a thermally susceptible high-speed optoelectronic device to a PCB, comprising a combination of one or more flat pins or gull wing pins capable of transmitting high-speed electrical signals above 5 Gbps for being locally soldered to one or more matching surface mount pads on the PCB, and a pin grid array capable of transmitting only low-speed electrical signals below 5 Gbps mounted on the substrate for fitting into and connecting to a geometrically matching array of through-hole connections on the PCB.
Coriant | Date: 2016-12-06
A heat sink for a semiconductor chip device includes cavities in a lower surface thereof for receiving electrical components on a top surface of the semiconductor chip, and a pedestal extending through an opening in the semiconductor chip for contacting electrical components on a bottom surface of the semiconductor chip. A lid may also be provided on the bottom surface of the semiconductor chip for protecting the electrical components and for heat sinking the electrical components to an adjacent device or printed circuit board.
Coriant | Date: 2017-01-18
A Ge-on-Si photodetector constructed without doping or contacting Germanium by metal is described. Despite the simplified fabrication process, the device has responsivity of 1.24 A/W, corresponding to 99.2% quantum efficiency. Dark current is 40 nA at -4 V reverse bias. 3-dB bandwidth is 30 GHz.
Coriant | Date: 2015-11-19
Described are various embodiments of a dual optical modulator, system and method. In one embodiment, an optical modulator modulates an input optical signal having a designated optical frequency. The modulator comprises first and second tunable modulators operable around the optical frequency and operatively disposed between a bus waveguide path and an opposed waveguide path. The modulator further comprises a relative optical phase-shifter optically coupled between the tunable modulators so to impart a relative optical phase shift between the bus waveguide path and the opposed waveguide path. The tunable modulators are respectively driveable to modulate a respective resonance thereof in complimentary directions relative to the optical frequency and thereby resonantly redirect a selectable portion of the input optical signal along the opposed waveguide path such that the relative optical phase shift is imparted thereto for output. Embodiments of an optical modulation method and an IQ modulator are also described.
Coriant | Date: 2017-03-29
A network element of a software-defined network comprises a data transfer interface (211) for receiving and transmitting data and a processing system (212) for constructing, in accordance with configuration data received from a controller system of the software-defined network, a configuration system for managing data to be forwarded. The processing system is adapted to configure a first portion of the configuration system to associate, with data received at the network element, a configuring entity-specific identifier (CEID) that identifies a configuring entity, for example an application, related to the received data. The configuring entity- specific identifier constitutes at least a part of metadata associated with the received data. Appropriate other portions of the configuration system are configured to use this metadata when determining actions to be carried out in conjunction with the received data. The configuring entity-specific identifier prevents conflicts between different configuring entities, for example applications, in the configuration system.