Abstract: The disclosed computer-implemented method may include (1) defining a topology of a data center network that defines an arrangement of a plurality of networking devices included in the data center network, (2) generating a routing policy for the data center network based on the defined topology, (3) deriving a forwarding information base (FIB) for each networking device based on the defined topology and the generated routing policy for the data center network, (4) compiling a data center traffic profile for the data center network that includes a set of data flows that include an amount of data that a source networking device begins to transfer to a destination networking device via the data center network at a predetermined time, and (5) executing a simulation of the data center network via the data center traffic profile. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: The disclosed computer-implemented method may include (1) defining a topology of a data center network that defines an arrangement of a plurality of networking devices included in the data center network, (2) generating a routing policy for the data center network based on the defined topology, (3) deriving a forwarding information base (FIB) for each networking device based on the defined topology and the generated routing policy for the data center network, (4) compiling a data center traffic profile for the data center network that includes a set of data flows that include an amount of data that a source networking device begins to transfer to a destination networking device via the data center network at a predetermined time, and (5) executing a simulation of the data center network via the data center traffic profile. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: A system receive, from an optical receiver, a signal derived from a first optical signal and a second optical signal generated by a local oscillator, that includes a first component that is an in-phase component and a second component that is a quadrature phase component; filter the signal, using a filter, set to one or more configurations, to obtain one or more recovered signals, where each of the recovered signals includes a respective quantity of noise; perform forward error correction, on the recovered signals, to obtain one or more quantities of bit errors that correspond to the recovered signals; and process the signal using the filter set to a particular configuration, of the one or more configurations, that corresponds to a lowest quantity of bit errors of the one or more quantities of bit error.

Abstract: Consistent with the present disclosure, a portion of light output from a laser, such as a local oscillator laser, is supplied to an optical circuit. The optical circuit may include a delay line interferometer that supplies a further optical signal that is sensed by a photodetector circuit. Alternatively, a 90 degree optical hybrid may be provided which receives two inputs whereby one input is delayed relative to the other input. The outputs of the optical hybrid are also supplied to a photodetector circuit. An electrical signal output from the photodetector circuit is indicative of changes in phase of the light output from the laser. A processor circuit may be configured to process the electrical signal to determine an accumulated phase of the laser light based on the electrical signal. Alternatively, based on the electrical signal, phase offset values may be obtained to offset or compensate local oscillator phase noise.

Abstract: A system may receive a group of electrical signals from an optical receiver and via a group of channels; identify a first signal, as a reference signal, that is received via a first channel; and identify a second signal, as an orthogonal signal, that is received via a second channel, where the second signal may be orthogonal to the first signal. The system may further measure a group of skew values based on a difference in arrival times between one or more other signals, of the group of electrical signals, and the reference signal or the orthogonal signal; generate a group of de-skew values based on at least a portion of the skew values; and transmit the de-skew values, to the optical receiver, where transmitting the de-skew values allows the optical receiver to de-skew signals on the group of channels.

Abstract: The present disclosure provides a system, apparatus and method to reduce phase noise associated with a received data signal, while optimizing system performance. An optimal length of a digital filter, employed in a carrier phase recovery process, is determined such that phase noise is reduced in the received data signal. Reduction of the phase noise present in the received data signal leads to improved receiver performance. The optimal length of the digital filter may be continuously performed, resulting in optimal performance of the receiver.

Abstract: A system may receive a group of electrical signals from an optical receiver and via a group of channels; identify a first signal, as a reference signal, that is received via a first channel; and identify a second signal, as an orthogonal signal, that is received via a second channel, where the second signal may be orthogonal to the first signal. The system may further measure a group of skew values based on a difference in arrival times between one or more other signals, of the group of electrical signals, and the reference signal or the orthogonal signal; generate a group of de-skew values based on at least a portion of the skew values; and transmit the de-skew values, to the optical receiver, where transmitting the de-skew values allows the optical receiver to de-skew signals on the group of channels.

Abstract: A system receive, from an optical receiver, a signal derived from a first optical signal and a second optical signal generated by a local oscillator, that includes a first component that is an in-phase component and a second component that is a quadrature phase component; filter the signal, using a filter, set to one or more configurations, to obtain one or more recovered signals, where each of the recovered signals includes a respective quantity of noise; perform forward error correction, on the recovered signals, to obtain one or more quantities of bit errors that correspond to the recovered signals; and process the signal using the filter set to a particular configuration, of the one or more configurations, that corresponds to a lowest quantity of bit errors of the one or more quantities of bit error.

Abstract: Systems and methods of compensating for transmission impairment over an optical transmission channel are disclosed. The optical transmission channel includes an optical fiber and an optical amplifier. One such method includes: receiving an optical signal which has been distorted in the physical domain by an optical transmission channel; and solving a non-linear Schrödinger equation (NLSE) using a split-step Fourier Method (SSFM). The NLSE describes a virtual optical fiber corresponding to the optical fiber. The SSFM implements a linear operator with a wavelet-based FIR filter.

Abstract: Systems and method of compensating for transmission impairment are disclosed. One such method comprises: receiving an optical signal which has been distorted in the physical domain by an optical transmission channel; and propagating the distorted optical signal backward in the electronic domain in a corresponding virtual optical transmission channel.

Abstract: The present disclosure provides a system, apparatus and method to reduce phase noise associated with a received data signal, while optimizing system performance. An optimal length of a digital filter, employed in a carrier phase recovery process, is determined such that phase noise is reduced in the received data signal. Reduction of the phase noise present in the received data signal leads to improved receiver performance. The optimal length of the digital filter may be continuously performed, resulting in optimal performance of the receiver.

Abstract: Methods and systems for novel infinite impulse response filtering system to allow DC using a complex input signal having a real and imaginary part of the complex input signal yr and yi to produce a real part of a dispersion-compensated signal Xr. The system includes a first filtering circuit for filtering the real part of the input signal yr to produce a filtered real signal w1, a second filtering circuit for filtering and time reversing the imaginary part of an input signal yi to produce a filtered imaginary signal, and a first output summing device for summing the real and the imaginary filtered signal to produce the real part of a dispersion-compensated signal Xr. In an embodiment the filtering is accomplished with time reversing devices and real coefficient infinite impulse filters. In another embodiment, the filtering is accomplished with complex-coefficient infinite impulse filters.

Abstract: Consistent with the present disclosure, a portion of light output from a laser, such as a local oscillator laser, is supplied to an optical circuit. The optical circuit may include a delay line interferometer that supplies a further optical signal that is sensed by a photodetector circuit. Alternatively, a 90 degree optical hybrid may be provided which receives two inputs whereby one input is delayed relative to the other input. The outputs of the optical hybrid are also supplied to a photodetector circuit. An electrical signal output from the photodetector circuit is indicative of changes in phase of the light output from the laser. A processor circuit may be configured to process the electrical signal to determine an accumulated phase of the laser light based on the electrical signal. Alternatively, based on the electrical signal, phase offset values may be obtained to offset or compensate local oscillator phase noise.

Abstract: Systems and methods of compensating for transmission impairment over an optical transmission channel are disclosed. The optical transmission channel includes an optical fiber and an optical amplifier. One such method includes: receiving an optical signal which has been distorted in the physical domain by an optical transmission channel; and solving a non-linear Schrödinger equation (NLSE) using a split-step Fourier Method (SSFM). The NLSE describes a virtual optical fiber corresponding to the optical fiber. The SSFM implements a linear operator with a wavelet-based FIR filter.

Abstract: Systems and method of compensating for transmission impairment are disclosed. One such method comprises: receiving an optical signal which has been distorted in the physical domain by an optical transmission channel; and propagating the distorted optical signal backward in the electronic domain in a corresponding virtual optical transmission channel.