Abstract:
An apparatus, comprising a linecard including a circuit board having a front side connectable to a pluggable optical module and a back side opposite the front side; a heat relay apparatus comprising a heat pipe on the circuit board; a pluggable optical module generating a first amount of heat and being in thermal contact with the heat pipe; and a cooling module including a heat sink in thermal contact with the heat pipe, the cooling module generating a second amount of heat in a range from the first amount of heat to no heat; and wherein heat from the pluggable optical module is transferable through the heat pipe to the cooling module for dispersal from the heat sink.
Abstract:
An apparatus having a first waveguide, a second waveguide, a third waveguide, a fourth waveguide, and a fifth waveguide is described. A symmetric coupler has a proximal end and a distal end. The proximal end of the symmetric coupler is coupled to and in optical communication with the first waveguide and the second waveguide. The distal end of the symmetric coupler is coupled to and in optical communication with the fourth waveguide. An asymmetric coupler has a proximal end and a distal end. The asymmetric coupler is in a cascaded configuration with the symmetric coupler. The cascaded configuration has the proximal end of the asymmetric coupler coupled to and in optical communication with the fourth waveguide and the third waveguide. The distal end of the asymmetric coupler is coupled to and in optical communication with the fifth waveguide.
Abstract:
Systems and methods are disclosed for modulating, with circuitry of a source node in a communication network, at least one optical carrier to carry data utilizing a format of a soft decision forward error correction (SD-FEC) data field of an overhead portion of a data frame; encoding, with the circuitry of the source node, first data being SD-FEC data and second data being additional data into the SD-FEC data field, the first and second data being accessible without accessing client data traffic; and transmitting, with the circuitry of the source node, the data frame including the soft decision forward error correction data field. In one implementation, the second data comprises automatic protection switching bytes.
Abstract:
A device receives a modulation format and a baud rate for transmission of an optical signal, and generates optical signals based on the modulation format and the baud rate. The device generates quadrature-delay-interferometer signals based on the optical signal, the modulation format, and the baud rate, and generates a particular optical signal with a particular wavelength for the modulation format and the baud rate. The device determines whether a point of the quadrature-delay-interferometer signals is associated with the particular wavelength of the particular optical signal, and sets or adjusts the particular wavelength of the particular optical signal for the modulation format and the baud rate based on whether a point of the quadrature-delay-interferometer signals is associated with the particular wavelength of the particular optical signal.
Abstract:
A method and system are disclosed in which a link state advertisement message (LSA) conforming to a Generalized Multiprotocol Label Switching (GMPLS) routing protocol is generated and transmitted. The LSA is associated with a TE Link between a transmit node and a receive node in a network. The transmit node supplies a plurality of optical signals, each of which has a plurality of frequencies, the frequencies being allocated among a plurality of spectral portions such that the plurality of spectral portions are grouped into a plurality of frequency slots. The LSA may include information indicative of a number of spectral portions, e.g., spectral slices, which correspond to frequencies of selected ones of the plurality of optical signals, said selected ones of the plurality of optical signals being available to carry data from the transmit node to the receive node.
Abstract:
A digital signal processor (DSP), may identify symbol values associated with a 5 quadrature amplitude modulation (5QAM) signal. The DSP may determine a first bit set based on the symbol values and a first particular bit value. The DSP may determine a second bit set based on the symbol values and a second particular bit value. The DSP may compute a first distance based on the first bit set and the symbol values. The DSP may compute a second distance based on the second bit set and the symbol values. The DSP may determine that the first distance is less than the second distance. The first distance being less than the second distance may indicate that the first bit set is a correctly decoded bit set. The DSP may provide an output associated with the correctly decoded bit set.
Abstract:
A photonic transmitter, comprises a modulator driver having a first and second output ports, a photonic integrated transmitter circuit having a modulator having a first and a second input line, and a first input port electrically coupled with the first input line and a second input port electrically coupled with the second input line, and an interconnect bridge assembly, including a first termination resistor, a second termination resistor, and a substrate. An impedance-controlled transmission structure is formed in the substrate, and has: (a) an impedance control section including a first and a second signal lines electrically insulated from one another; and (b) a transmission section including a third and a fourth signal line coupled with termination resistor. The interconnect bridge assembly transmits an impedance controlled differential electrical signal from the modulator driver to the modulator, and transmits the electrical signal from the modulator to the first and second termination resistors.
Abstract:
Apparatuses are disclosed including a node having a switch for communicating traffic from input interface to output interface; and a control module, located proximate to the input interface, output interface and switch, comprising a communication interface configured to connect to a third communication link external to the node and having a processor accessing network node configuration information and being configured to compute a path to a destination node through the output interface with the network node configuration information and also configured to be switched from a first state in which the processor provides first instructions to the switch to configure the switch to communicate the traffic from the input interface to the output interface, to a second state in which the processor provides second instructions, received via the communication interface, to the switch to configure the switch to communicate traffic from the input interface to the output interface.
Abstract:
Systems and methods for accessing network configuration data identifying one or more working path(s) configured to transport data between source and destination nodes, wherein multiple working paths are prioritized, and including at least one first diversity weight of a first value indicative of at least one communication link in the working path(s), and at least one second diversity weight of a second value indicative of at least one communication link outside of the working path(s); calculating a disjoint protection path with the network configuration data, the first diversity weight, and the second diversity weight; the disjoint protection path including at least the source node and the destination node and at least one communication link that is mutually exclusive from the at least one communication link of the first set; and outputting at least one setup signal to configure the disjoint protection path within the mesh network.
Abstract:
An apparatus including a photodiode, a low pass filter, an analog-to-digital converter, an interpolation circuit and a digital signal processor is disclosed. The photodiode receives a portion of a plurality of optical signals, each of which is modulated in accordance with a corresponding one of a plurality of data streams, and each having a corresponding one of a plurality of wavelengths. The photodiode supplies an electrical output. The low-pass filter supplies a filtered output in response to the electrical output. The analog-to-digital converter is configured to sample the filtered output at a first sampling rate to generate a plurality of first data samples. The interpolation circuit is configured to receive the plurality of first data samples and supply a plurality of second data samples at a second sampling rate less the first sampling rate. The digital signal processor circuit is configured to receive the plurality of second data samples.