Abstract: A system for providing optical connections that may include an optical grating structure and an optical waveguide coupled to the optical grating structure. The optical grating structure may be configured to receive an optical wave, through an interposer, from an optical source. The optical grating structure may be configured to transform the optical wave into a predetermined electromagnetic propagation mode.

Abstract: Systems and methods to detect a wavelength of interest (?RX) amongst one or more wavelengths (?1, ?2, . . . , ?N) include receiving the one or more wavelengths (?1, ?2, . . . , ?N); using a portion of a transmitted wavelength (?TX) as a Local Oscillator (LO) signal to perform performing coherent detection with the one or more wavelengths, wherein the transmitted wavelength (?TX) and the wavelength of interest (?RX) are a bi-directional communication link; and determining a presence of the wavelength of interest (?RX) based on the coherent detection.

Abstract: A high port count switching module includes a plurality of switching circuits disposed on a glass interposer, wherein the plurality of switching circuits each include cross-point switches configured to perform switching at a full signal rate; and a plurality of optical transceivers disposed on the glass interposer and communicatively coupled to the plurality of switching circuits. The glass interposer has i) a low dielectric loss, relative to a silicon, organic, or ceramic interposer, to allow wideband data transmission, ii) a smooth surface, resulting in smooth metal traces to minimize high-frequency skin effect loss, iii) a coefficient of thermal expansion that is matched to the plurality of switching circuits to minimize stresses, and iv) thermal isolation among the plurality of switching circuits due to low thermal conductivity of glass.

Abstract: A system for providing optical connections that may include an optical grating structure and an optical waveguide coupled to the optical grating structure. The optical grating structure may be configured to receive an optical wave, through an interposer, from an optical source. The optical grating structure may be configured to transform the optical wave into a predetermined electromagnetic propagation mode.

Abstract: A method, performed by a server, for supporting equipment service at a site includes receiving, from Head Mounted Equipment (HME) associated with an installer at a site, data relating to an inventory and location of equipment at the site, wherein the data is collected by the HME during equipment service, wherein the equipment includes one or more of a circuit pack, a line module, a cable and power equipment; and checking the equipment service based on the received data and at least one of plans associated with the site and configuration rules of the equipment.

Abstract: The present disclosure provides dynamic performance monitoring systems and methods for optical networks to ascertain optical network health in a flexible and accurate manner. The present invention introduces accurate estimations for optical channel performance characteristics based either on existing channels or with a dynamic optical probe configured to measure characteristics on unequipped wavelengths. Advantageously, the dynamic performance monitoring systems and methods introduce the ability to determine physical layer viability in addition to logical layer viability.

Abstract: An optical switch fabric includes horizontal optical waveguides including a first set and a second set, the first set is configured to receive a first plurality of wavelengths from the one or more external switches and the second set is configured to send a second plurality of wavelengths to the one or more external switches; wavelength-selective drop optical switches associated with the first set, wherein the wavelength-selective drop optical switches are each configured to drop a selected wavelength from a horizontal optical waveguide of the first set to an associated vertical optical waveguide of vertical optical waveguides; and controllable optical switches associated with the vertical optical waveguides, wherein the controllable optical switches are each configured to direct a selected wavelength from a vertical optical waveguide to a horizontal optical waveguide of the second set.

Abstract: A circuit that may include a circuit network and a transmission line coupled to the circuit network. The circuit network may include an electro-optic modulator and various inductors. The electro-optic modulator may be a capacitive load having a predetermined capacitance. The circuit may further include a resistor coupled to the circuit network. The resistor may have a resistance value configured to produce a first impedance with the circuit network. The first impedance may be configured to match substantially with a second impedance in the transmission line. The circuit may further include an electric driver couple to the transmission line. The electric driver may be configured for transmitting a driving voltage to the electro-optic modulator. The driving voltage may be configured to generate a predetermined voltage swing across the electro-optic modulator.

Abstract: A concatenated Forward Error Correction (FEC) code method, at an intermediate point, includes receiving, from an ingress point, a signal that is fully encoded with a concatenated FEC code, wherein the concatenated FEC code includes at least an inner code and an outer code; partially decoding the signal by decoding the inner code at the intermediate point; and transmitting the partially decoded signal towards an egress point where the partially decoded signal is fully decoded.

Abstract: The present disclosure provides a multi-carrier optical transmitter, receiver, transceiver, and associated methods utilizing offset quadrature amplitude modulation thereby achieving significant increases in spectral efficiency, with negligible sensitivity penalties. In an exemplary embodiment, an optical transmitter includes circuitry configured to generate a plurality of optical subcarriers, a plurality of data signals for each of the plurality of subcarriers, and a plurality of modulator circuits for each of the plurality of subcarriers, wherein each of the plurality of modulator circuits includes circuitry configured to offset an in-phase component from a quadrature component of one of the plurality data signals by one-half baud period.

Abstract: A high-speed 100G optical transceiver, such as for InfiniBand and Ethernet, with associated mapping to frame various different protocols. The optical transceiver utilizes an architecture which relies on standards-compliant (i.e., multi-sourced) physical client interfaces. These client interfaces are back-ended with flexible, programmable Field Programmable Gate Array (FPGA) modules to accomplish either InfiniBand or Ethernet protocol control, processing, re-framing, and the like. Next, signals are encoded with Forward Error Correction (FEC) and can include additional Optical Transport Unit (OTU) compliant framing structures. The resulting data is processed appropriately for the subsequent optical re-transmission, such as, for example, with differential encoding, Gray encoding, I/Q Quadrature encoding, and the like. The data is sent to an optical transmitter block and modulated onto an optical carrier. Also, the same process proceeds in reverse on the receive side.

Abstract: The present disclosure provides dynamic performance monitoring systems and methods for optical networks to ascertain optical network health in a flexible and accurate manner. The present invention introduces accurate estimations for optical channel performance characteristics based either on existing channels or with a dynamic optical probe configured to measure characteristics on unequipped wavelengths. Advantageously, the dynamic performance monitoring systems and methods introduce the ability to determine physical layer viability in addition to logical layer viability.

Abstract: An optical transceiver configured to interface a composite signal in a parallelized manner includes a plurality of transmitters each configured to transmit a part of the composite signal over a first optical fiber; a plurality of receivers each configured to receive a part of the composite signal over a second optical fiber; a clock forwarding mechanism configured to provide a transmitted optical clock for all of the plurality of transmitters; and a clock recovery mechanism configured to receive a received optical clock for all of the plurality of receivers.

Abstract: A data center utilizing an architecture minimizing Internet Protocol (IP) routing therein includes one or more service edge network elements located in the data center, wherein a sub-IP network communicatively couples the one or more service edge network elements to one or more customer edge network elements located at or near demarcation points between a customer edge network and a service provider network, wherein the one or more customer edge network elements and the one or more service edge network elements are configured to provide direct user access to the data center for a plurality of users; and a control system communicatively coupled to the one or more service edge network elements and the sub-IP network, wherein the control system is configured to control resources on the sub-IP network and the data center for the plurality of users.

Abstract: A circuit that may include a circuit network and a transmission line coupled to the circuit network. The circuit network may include an electro-optic modulator and various inductors. The electro-optic modulator may be a capacitive load having a predetermined capacitance. The circuit may further include a resistor coupled to the circuit network. The resistor may have a resistance value configured to produce a first impedance with the circuit network. The first impedance may be configured to match substantially with a second impedance in the transmission line. The circuit may further include an electric driver couple to the transmission line. The electric driver may be configured for transmitting a driving voltage to the electro-optic modulator. The driving voltage may be configured to generate a predetermined voltage swing across the electro-optic modulator.

Abstract: A system for providing optical connections that may include an optical grating structure and an optical waveguide coupled to the optical grating structure. The optical grating structure may be configured to receive an optical wave, through an interposer, from an optical source. The optical grating structure may be configured to transform the optical wave into a predetermined electromagnetic propagation mode.

Abstract: The present disclosure provides systems and methods for the compensation of signal distortion in fiber optic communication systems and the like. More specifically, the present disclosure provides an orthogonal polarization detection and broadband pilot (OPDBP) technique for the compensation of nonlinear cross polarization (i.e. nonlinear cross polarization modulation) (XPolM) induced noise and nonlinear nonlinear cross phase modulation (XPM) induced noise in a high data rate polarization multiplexed (PM) multilevel-quadrature amplitude modulated (M-QAM) channel due to neighboring channels. This approach allows for the compensation of both XPolM and XPM simultaneously, providing several dBs of optical reach extension. The approach uses a pilot tone based orthogonal polarization detection scheme with broadband (i.e. a few GHz wide) filtering of the pilot tones.

Abstract: An optical transceiver includes N transmitters each transmitting one of N transmitted optically bound channels; a clock forwarding mechanism to transmit a transmitted optical clock signal to an opposing optical receiver; N receivers each receiving one of N received optically bound channels; and a clock recovery mechanism to receive a received optical clock signal from the opposing optical transmitter. A method and photonically integrated system are also disclosed. The optical transceiver, method, and system optimize system design of WDM highly parallelized transceivers with optical bound channels, a simplified clocking architecture, and boosted receiver sensitivity. The optical transceiver, method, and system include clock recovery followed by data recovery and can utilize integrate-and-dump optical receivers with a recovered clock.

Abstract: A fiber optic system includes a transmitter configured to utilize a plurality of modulation formats and a receiver communicatively coupled to the transmitter and configured to utilize a plurality of modulation formats. The transmitter and the receiver are cooperatively configured to set a modulation format of the plurality of modulation formats based upon optical signal-to-noise ratio associated therewith. A flexible bandwidth adaptation method includes monitoring at least one aspect of an optical link at a network element, responsive to the at least one aspect, computing a new modulation scheme for the optical link, and, if a solution is found for the new modulation scheme, changing to the new modulation format.

Abstract: A high-speed 100 G optical transceiver, such as for InfiniBand and Ethernet, with associated mapping to frame various different protocols. The optical transceiver utilizes an architecture which relies on standards-compliant (i.e., multi-sourced) physical client interfaces. These client interfaces are back-ended with flexible, programmable Field Programmable Gate Array (FPGA) modules to accomplish either InfiniBand or Ethernet protocol control, processing, re-framing, and the like. Next, signals are encoded with Forward Error Correction (FEC) and can include additional Optical Transport Unit (OTU) compliant framing structures. The resulting data is processed appropriately for the subsequent optical re-transmission, such as, for example, with differential encoding, Gray encoding, I/Q Quadrature encoding, and the like. The data is sent to an optical transmitter block and modulated onto an optical carrier. Also, the same process proceeds in reverse on the receive side.