Abstract: An optical subassembly includes a thru optical via (104) formed through a semiconductor substrate (102), an optoelectronic component (108) secured to the substrate (102) such that an active region (106) of the optoelectronic component is aligned with the thru optical via (104), and circuitry (110) formed into the substrate (102), the circuitry to connect to and operate in accordance with the optoelectronic component (108).

Abstract: A combination underfill-dam and electrical-interconnect structure for an opto-electronic engine. The structure includes a first plurality of electrical-interconnect solder bodies. The first plurality of electrical-interconnect solder bodies includes a plurality of electrical interconnects. The first plurality of electrical-interconnect solder bodies, is disposed to inhibit intrusion of underfill material into an optical pathway of an opto-electronic component for the opto-electronic engine. A system and an opto-electronic engine that include the combination underfill-dam and electrical interconnect structure are also provided.

Abstract: A device for converting and optionally processing an optical signal comprises an optical cable having an optical-electrical conversion device at one end, the optical-electrical conversion device to convert the optical signal to an electrical signal or an electrical signal into an optical signal; a electrical package to removably receive the optical-electrical conversion device and generate processed signal; and a general circuit board attached to the electrical package and operable to receive the processed signal.

Abstract: An optical subassembly includes a thru optical via (104) formed through a semiconductor substrate (102), an optoelectronic component (108) secured to the substrate (102) such that an active region (106) of the optoelectronic component is aligned with the thru optical via (104), and circuitry (110) formed into the substrate (102), the circuitry to connect to and operate in accordance with the optoelectronic component (108).

Abstract: A combination underfill-dam and electrical-interconnect structure for an opto-electronic engine. The structure includes a first plurality of electrical-interconnect solder bodies. The first plurality of electrical-interconnect solder bodies includes a plurality of electrical interconnects. The first plurality of electrical-interconnect solder bodies, is disposed to inhibit intrusion of underfill material into an optical pathway of an opto-electronic component for the opto-electronic engine. A system and an opto-electronic engine that include the combination underfill-dam and electrical interconnect structure are also provided.

Abstract: Various embodiments of the present invention are directed to optical broadcast buses configured with shared optical interfaces for fan-in and fan-out of optical signals. In one aspect, an optical broadcast bus comprises a number of optical interfaces, a fan-in bus optically coupled to the number of optical interfaces, and a fan-out bus optically coupled to the number of optical interfaces. Each optical interface is configured to convert an electrical signal produced by the at least one node into an optical signal that is received and directed by the fan-in bus to the fan-out bus and broadcast by the fan-out bus to the number of optical interfaces. Each optical interface also converts the optical signal into an electrical signal that is sent to the electronically coupled at least one node for processing.

Abstract: A device for converting and optionally processing an optical signal comprises an optical cable having an optical-electrical conversion device at one end, the optical-electrical conversion device to convert the optical signal to an electrical signal or an electrical signal into an optical signal; a electrical package to removably receive the optical-electrical conversion device and generate processed signal; and a general circuit board attached to the electrical package and operable to receive the processed signal.

Abstract: Various embodiments of the present invention are directed to optical broadcast buses configured with shared optical interfaces for fan-in and fan-out of optical signals. In one aspect, an optical broadcast bus (100,200,300) comprises a number of optical interfaces (121-123,210,212,216,218,301-303), a fan-in bus (102,202) optically coupled to the number of optical interfaces, and a fan-out bus (104,204) optically coupled to the number of optical interfaces. Each optical interface is configured to convert an electrical signal produced by the at least one node into an optical signal that is received and directed by the fan-in bus to the fan-out bus and broadcast by the fan-out bus to the number of optical interfaces. Each optical interface also converts the optical signal into an electrical signal that is sent to the electronically coupled at least one node for processing.

Abstract: Embodiments of the present invention are directed to optical multiprocessing buses. In one embodiment, an optical broadcast bus includes a repeater, a fan-in bus optically coupled to a number of nodes and the repeater, and a fan-out bus optically coupled to the nodes and the repeater. The fan-in bus is configured to receive optical signals from each node and transmit the optical signals to the repeater, which regenerates the optical signals. The fan-out bus is configured to receive the regenerated optical signals output from the repeater and distribute the regenerated optical signals to the nodes. The repeater can also serve as an arbiter by granting one node at a time access to the fan-in bus.

Abstract: Various embodiments of the present invention are directed to methods for determining the resistance state of nanowire-crossbar junctions, and can also be used to determine the resistance state of sub-microscale crossbar junctions. A pair of wires interconnected through the crossbar junction is biased to determine a first signal for the crossbar junction. The pair of wires interconnected through the crossbar junction is then biased again to increase the resistance of the crossbar junction. The pair of wires interconnected through the crossbar junction is then biased again to determine a second signal for the crossbar junction. The first signal is compared to the second signal to determine the resistance state of the crossbar junction.

Abstract: Various embodiments of the present invention are directed to demultiplexers that include tunneling resistor nanowire junctions, and to nanowire addressing methods for reliably addressing nanowire signal lines in nanoscale and mixed-scale demultiplexers. In one embodiment of the present invention, an encoder-demultiplexer comprises a number of input signal lines and an encoder that generates an n-bit-constant-weight-code code-word internal address for each different input address received on the input signal lines. The encoder-demultiplexer includes n microscale signal lines on which an n-bit-constant-weight-code code-word internal address is output by the encoder, where each microscale signal line carries one bit of the n-bit-constant-weight-code code-word internal address.

Abstract: Various embodiments of the present invention are directed to demultiplexers that include tunneling resistor nanowire junctions, and to nanowire addressing methods for reliably addressing nanowire signal lines in nanoscale and mixed-scale demultiplexers. In one embodiment of the present invention, an encoder-demultiplexer comprises a number of input signal lines and an encoder that generates an n-bit-constant-weight-code code-word internal address for each different input address received on the input signal lines. The encoder-demultiplexer includes n microscale signal lines on which an n-bit-constant-weight-code code-word internal address is output by the encoder, where each microscale signal line carries one bit of the n-bit-constant-weight-code code-word internal address.

Abstract: A composite material and related methods are described, the composite material being configured to exhibit a negative effective permittivity and/or a negative effective permeability for incident radiation at an operating wavelength, the composite material comprising an arrangement of electromagnetically reactive cells of small dimension relative to the operating wavelength. Each cell includes an externally powered gain element for enhancing a resonant response of that cell to the incident radiation at the operating wavelength.

Abstract: Various embodiments of the present invention are directed to methods for determining the resistance state of nanowire-crossbar junctions, and can also be used to determine the resistance state of sub-microscale crossbar junctions. A pair of wires interconnected through the crossbar junction is biased to determine a first signal for the crossbar junction. The pair of wires interconnected through the crossbar junction is then biased again to increase the resistance of the crossbar junction. The pair of wires interconnected through the crossbar junction is then biased again to determine a second signal for the crossbar junction. The first signal is compared to the second signal to determine the resistance state of the crossbar junction.

Abstract: A composite material and related methods are described, the composite material being configured to exhibit a negative effective permittivity and/or a negative effective permeability for incident radiation at an operating wavelength, the composite material comprising an arrangement of electromagnetically reactive cells of small dimension relative to the operating wavelength. Each cell includes an externally powered gain element for enhancing a resonant response of that cell to the incident radiation at the operating wavelength.

Abstract: A novel apparatus for optically interconnecting integrated circuits that reduces optical path alignment difficulties and enhances signal quality. The present invention employs one or more holographic optical elements adapted for directing one or more modulated beams of light. Because each holographic optical element is individually aligned with a respective photonic device, the present invention is free from registration run off that is associated with large dimension optical substrates employed in previous optical interconnect schemes. Accordingly, optical path alignment between transmitting photonic devices and receiving photonic devices is preserved.

Abstract: A universal register which consists of a plurality of identical emitter coupled logic (ECL) bit slices and auxiliary ECL gates adapted for fabrication on a single large scale integration (LSI) chip. Each bit slice is comprised of a master-slave flip-flop (a master latch circuit and a slave latch circuit) and an output control network which is driven by the flip-flop. Each of the latch circuits and the output control network comprises a single stage (unit propagation delay), two decision level cascode ECL circuit. The output control network selectively supplies either the Q or the Q output signal from the flip-flop or a logic zero signal to the network's output terminal (designated P).