Patents by Inventor Michael Andrew REIMER
Michael Andrew REIMER has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190190648Abstract: Systems and methods for estimating a transmit symbol sequence implemented in a coherent receiver include receiving a nominally error-free information bit sequence subsequent to Forward Error Correction (FEC) decoding; determining a nominally error-free estimate of the transmitted bit sequence based on the nominally error-free information bit sequence; and determining a nominally error-free estimate of the transmit symbol sequence by mapping the transmit bit sequence to transmit symbols. The system and methods can further include comparing a transmit optical field based on the transmit symbols to a received optical field for one or more measurements.Type: ApplicationFiled: December 18, 2017Publication date: June 20, 2019Inventors: Michael Andrew REIMER, Qunbi ZHUGE, Manoj VERGHESE, Hamid EBRAHIMZAD, Maurice O'SULLIVAN
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Publication number: 20190170608Abstract: Methods and assemblies for determining a property or environment of an optical fiber, including: measuring a frequency dependent electrostrictive response of an optical fiber; and based on the measured frequency dependent electrostrictive response, determining a property of the optical fiber. The property or environment of the optical fiber includes one or more of optical fiber type, optical fiber material type, optical fiber material property, optical fiber area, optical fiber geometry, optical fiber condition, optical fiber stress and strain, optical fiber environment, optical fiber temperature, optical fiber routing, optical fiber spooling, and optical fiber radiation exposure.Type: ApplicationFiled: December 1, 2017Publication date: June 6, 2019Inventors: Andrew D. SHINER, Michael Andrew REIMER, Maurice O'SULLIVAN
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Patent number: 10270537Abstract: A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel.Type: GrantFiled: September 18, 2017Date of Patent: April 23, 2019Assignee: Ciena CorporationInventors: Qunbi Zhuge, Michael Andrew Reimer, Shahab Oveis Gharan, Maurice Stephen O'Sullivan
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Patent number: 10193620Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.Type: GrantFiled: April 15, 2018Date of Patent: January 29, 2019Assignee: Ciena CorporationInventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
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Publication number: 20180343078Abstract: Multiple receivers are comprised in a flexible coherent transceiver of a multi-span optical fiber network. Each of the multiple receivers is operative to handle communications on a respective channel. The multiple receivers measure optical characteristics. For each of the multiple receivers, the optical characteristics include optical nonlinear interactions on the respective channel, the optical nonlinear interactions being at least partially dependent from one span to another span. An optical power of a signal on each of the multiple channels is adjusted as a function of the optical characteristics.Type: ApplicationFiled: October 27, 2017Publication date: November 29, 2018Applicant: Ciena CorporationInventors: Kim B. Roberts, James Harley, Qunbi Zhuge, Michael Andrew Reimer, Maurice O'Sullivan
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Patent number: 10090920Abstract: A method of fiber Kerr nonlinear noise estimation in an optical transmission system comprises recovering received symbols from a received signal, isolating a noise component of the received signal, estimating coefficients of a matrix based on cross-correlations between the isolated noise component and the fields of a triplet of received symbols or training symbols or estimated transmitted symbols, estimating doublet correlations of the product or the quotient of the isolated noise component and the field of a received symbol or of a training symbol or of an estimated transmitted symbol, and estimating one or more parameters related to nonlinear noise based on the estimated coefficients of the matrix and based on the estimated doublet correlations.Type: GrantFiled: March 17, 2017Date of Patent: October 2, 2018Assignee: Ciena CorporationInventors: Qunbi Zhuge, Michael Andrew Reimer, Maurice O'Sullivan
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Publication number: 20180269968Abstract: A method of fiber Kerr nonlinear noise estimation in an optical transmission system comprises recovering received symbols from a received signal, isolating a noise component of the received signal, estimating coefficients of a matrix based on cross-correlations between the isolated noise component and the fields of a triplet of received symbols or training symbols or estimated transmitted symbols, estimating doublet correlations of the product or the quotient of the isolated noise component and the field of a received symbol or of a training symbol or of an estimated transmitted symbol, and estimating one or more parameters related to nonlinear noise based on the estimated coefficients of the matrix and based on the estimated doublet correlations.Type: ApplicationFiled: March 17, 2017Publication date: September 20, 2018Applicant: Ciena CorporationInventors: Qunbi ZHUGE, Michael Andrew REIMER, Maurice O'SULLIVAN
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Publication number: 20180241468Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.Type: ApplicationFiled: April 15, 2018Publication date: August 23, 2018Applicant: Ciena CorporationInventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
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Patent number: 9973277Abstract: Aspects of the present invention provide techniques for compensating nonlinear impairments of a signal traversing an optical communications system. A parallel array of linear convolutional filters are configured to process a selected set of samples of the signal to generate an estimate of a nonlinear interference field. The predetermined set of samples comprises a first sample and a plurality of second samples. A processor applies the estimated nonlinear interference field to the first sample to least partially compensate the nonlinear impairment.Type: GrantFiled: April 18, 2016Date of Patent: May 15, 2018Assignee: Ciena CorporationInventors: Qunbi Zhuge, Shahab Oveis Gharan, Michael Andrew Reimer, Maurice O'Sullivan
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Patent number: 9960843Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.Type: GrantFiled: April 21, 2016Date of Patent: May 1, 2018Assignee: Ciena CorporationInventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
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Publication number: 20180083712Abstract: A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel.Type: ApplicationFiled: September 18, 2017Publication date: March 22, 2018Applicant: Ciena CorporationInventors: Qunbi Zhuge, Michael Andrew Reimer, Shahab Oveis Gharan, Maurice Stephen O'Sullivan
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Publication number: 20170310390Abstract: Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.Type: ApplicationFiled: April 21, 2016Publication date: October 26, 2017Applicant: Ciena CorporationInventors: Andrew D. Shiner, Michael Andrew Reimer, Maurice O'Sullivan, Andrzej Borowiec
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Patent number: 9768880Abstract: A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel.Type: GrantFiled: May 20, 2015Date of Patent: September 19, 2017Assignee: Ciena CorporationInventors: Qunbi Zhuge, Michael Andrew Reimer, Shahab Oveis Gharan, Maurice Stephen O'Sullivan
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Patent number: 9768875Abstract: A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signalling interval, and has a second value when averaged across more than one and fewer than 100 signalling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.Type: GrantFiled: March 11, 2015Date of Patent: September 19, 2017Assignee: CIENA CORPORATIONInventors: Qunbi Zhuge, Michael Andrew Reimer, Shahab Oveis Gharan, Maurice O'Sullivan
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Patent number: 9749058Abstract: Techniques for transmitting a data signal through an optical communications system. An encoder is configured to encode the data signal to generate symbols to be modulated onto an optical carrier. Each symbol encodes multiple bits of data and includes a first portion selected from a first constellation and a second portion selected from a second constellation. The first and second constellations have respective different average amplitudes. Each of the first and second constellations have a cardinality of at least two and the cardinality of the first constellation is greater than the cardinality of the second constellation. A modulator is configured to modulate a first frame of the optical signal using the first portion and modulate a second frame of the optical signal using the second portion. A selection of one frame of the optical signal to be used as the first frame encodes at least 1 bit of data.Type: GrantFiled: June 19, 2015Date of Patent: August 29, 2017Assignee: CIENA CORPORATIONInventors: Michael Andrew Reimer, Shahab Oveis Gharan, Andrew D. Shiner, Maurice O'Sullivan
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Publication number: 20160373190Abstract: Techniques for transmitting a data signal through an optical communications system. An encoder is configured to encode the data signal to generate symbols to be modulated onto an optical carrier. Each symbol encodes multiple bits of data and includes a first portion selected from a first constellation and a second portion selected from a second constellation. The first and second constellations have respective different average amplitudes. Each of the first and second constellations have a cardinality of at least two and the cardinality of the first constellation is greater than the cardinality of the second constellation. A modulator is configured to modulate a first frame of the optical signal using the first portion and modulate a second frame of the optical signal using the second portion. A selection of one frame of the optical signal to be used as the first frame encodes at least I bit of data.Type: ApplicationFiled: June 19, 2015Publication date: December 22, 2016Applicant: CIENA CORPORATIONInventors: Michael Andrew Reimer, Shahab Oveis Gharan, Andrew D. Shiner, Maurice O'Sullivan
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Publication number: 20160344482Abstract: A method for preventing nonlinear interference in an optical communication system. The method may include selecting an optical signal of a first optical channel. The method may include determining an estimate of inter-channel nonlinear interference to the optical signal of the first optical channel. The inter-channel nonlinear interference may be generated by one or more optical signals transmitted over a second optical channel in the optical communication system. The method may include determining one or more linear filters based on the estimate of the inter-channel nonlinear interference. The method may include pre-distorting an optical signal for transmission over the second optical channel using the one or more linear filters. The pre-distorted optical signal may be configured for reducing the inter-channel nonlinear interference to the first optical signal of the first optical channel.Type: ApplicationFiled: May 20, 2015Publication date: November 24, 2016Applicant: Ciena CorporationInventors: Qunbi Zhuge, Michael Andrew Reimer, Shahab Oveis Gharan, Maurice Stephen O'Sullivan
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Publication number: 20160233963Abstract: Aspects of the present invention provide techniques for compensating nonlinear impairments of a signal traversing an optical communications system. A parallel array of linear convolutional filters are configured to process a selected set of samples of the signal to generate an estimate of a nonlinear interference field. The predetermined set of samples comprises a first sample and a plurality of second samples. A processor applies the estimated nonlinear interference field to the first sample to least partially compensate the nonlinear impairment.Type: ApplicationFiled: April 18, 2016Publication date: August 11, 2016Applicant: Ciena CorporationInventors: Qunbi ZHUGE, Shahab OVEIS GHARAN, Michael Andrew REIMER, Maurice O'SULLIVAN
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Patent number: 9319137Abstract: Aspects of the present invention provide techniques for compensating nonlinear impairments of a signal traversing an optical communications system. A parallel array of linear convolutional filters are configured to process a selected set of samples of the signal to generate an estimate of a nonlinear interference field. The predetermined set of samples comprises a first sample and a plurality of second samples. A processor applies the estimated nonlinear interference field to the first sample to least partially compensate the nonlinear impairment.Type: GrantFiled: September 9, 2014Date of Patent: April 19, 2016Assignee: CIENA CORPORATIONInventors: Qunbi Zhuge, Shahab Oveis Gharan, Michael Andrew Reimer, Maurice O'Sullivan
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Patent number: 9143238Abstract: A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signaling interval, and has a second value when averaged across more than one and fewer than 100 signaling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.Type: GrantFiled: August 19, 2013Date of Patent: September 22, 2015Assignee: CIENA CORPORATIONInventors: Kim B. Roberts, Maurice O'Sullivan, Mahmoud Taherzadehboroujeni, Shahab Oveis Gharan, Andrew D. Shiner, Michael Andrew Reimer