Patents by Inventor Graeme Pendock
Graeme Pendock 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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Patent number: 11171728Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: GrantFiled: June 2, 2017Date of Patent: November 9, 2021Assignee: ACACIA COMMUNICATIONS, INC.Inventors: Eric Swanson, Graeme Pendock
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Patent number: 10425154Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: GrantFiled: June 5, 2017Date of Patent: September 24, 2019Assignee: Acacia Communications, Inc.Inventors: Eric Swanson, Graeme Pendock
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Patent number: 9806839Abstract: Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. More specifically, a spatial division multiplexing photonic integrated circuit is used in conjunction with digital signal processing systems to mitigate the effects of the turbulent media.Type: GrantFiled: September 21, 2015Date of Patent: October 31, 2017Assignee: Acacia Communications, Inc.Inventors: Eric Swanson, Christopher Doerr, Graeme Pendock
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Publication number: 20170279524Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: ApplicationFiled: June 5, 2017Publication date: September 28, 2017Applicant: Acacia Communications, Inc.Inventors: Eric Swanson, Graeme Pendock
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Publication number: 20170272152Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: ApplicationFiled: June 2, 2017Publication date: September 21, 2017Applicant: Acacia Communications, Inc.Inventors: Eric Swanson, Graeme Pendock
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Patent number: 9680567Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: GrantFiled: March 2, 2012Date of Patent: June 13, 2017Assignee: Acacia Communications, Inc.Inventors: Eric A. Swanson, Graeme Pendock
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Publication number: 20160013880Abstract: Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. More specifically, a spatial division multiplexing photonic integrated circuit is used in conjunction with digital signal processing systems to mitigate the effects of the turbulent media.Type: ApplicationFiled: September 21, 2015Publication date: January 14, 2016Applicant: Acacia Communications, Inc.Inventors: Eric Swanson, Christopher Doerr, Graeme Pendock
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Patent number: 9154253Abstract: Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. More specifically, a spatial division multiplexing photonic integrated circuit is used in conjunction with digital signal processing systems to mitigate the effects of the turbulent media.Type: GrantFiled: November 4, 2013Date of Patent: October 6, 2015Assignee: Acacia Communications, Inc.Inventors: Eric Swanson, Christopher Doerr, Graeme Pendock
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Publication number: 20140126902Abstract: Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. More specifically, a spatial division multiplexing photonic integrated circuit is used in conjunction with digital signal processing systems to mitigate the effects of the turbulent media.Type: ApplicationFiled: November 4, 2013Publication date: May 8, 2014Inventors: Eric SWANSON, Christopher DOERR, Graeme PENDOCK
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Publication number: 20120230676Abstract: In an optical transmission system which utilizes polarization multiplexing, a receiver includes an adaptive equalizer which is adjusted at turn-up such that two polarization modes at the equalizer output are time aligned. The adaptive equalizer may be reset in a directed manner in response to an indication that one polarization mode is present at both the first and second outputs. Further, the dominant filters taps of the adaptive equalizer are maintained near a middle of a tap index range. The receiver may also include an interpolation function upstream of the adaptive equalizer and a symbol timing error estimation function that feeds a control signal back to the interpolation function, wherein the interpolation function causes the adaptive equalizer function and symbol timing error estimation function to receive an integer number of samples per symbol.Type: ApplicationFiled: March 7, 2012Publication date: September 13, 2012Inventors: Fan Mo, Sameep Dave, Christian Rasmussen, Mehmet Aydinlik, Graeme Pendock
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Publication number: 20120224846Abstract: Designs, methods, and applications for fault localization and fiber security in optical transponders is described. In one embodiment a two-way time transfer protocol or other suitable method for synchronizing clocks between distant transponders is used. The clock synchronized transponders have digital signal processing to continually detect high precision time-histories of physical layer attributes in the transmission between the two transponders. Physical layer attributes can include: state-of-polarization changes, changes in polarization-mode-dispersion, change in propagation delay, changes or loss-of-light, changes in OSNR, changes in BER between the two nodes. By recording these physical layer changes and time-stamping them information on the magnitude and estimated location of the changes can be inferred by from the time records. In one aspect the method may be used in a distributed optical sensor for monitoring trespassing events that are a risk to fiber security of an optical transmission link.Type: ApplicationFiled: March 2, 2012Publication date: September 6, 2012Applicant: ACACIA COMMUNICATIONS INC.Inventors: Eric A. Swanson, Graeme Pendock
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Patent number: 6529315Abstract: A dispersion-compensating fiber amplifier having a Raman pumped dispersion-compensating fiber and a distributed optical amplifier. The dispersion-compensating fiber is pumped such that the noise contribution of the dispersion-compensating fiber is reduced.Type: GrantFiled: April 27, 2001Date of Patent: March 4, 2003Assignee: Sycamore Networks, IncInventors: Glenn Bartolini, Graeme Pendock, John Zyskind
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Publication number: 20020159131Abstract: A dispersion-compensating fiber amplifier having a Raman pumped dispersion-compensating fiber and a distributed optical amplifier. The dispersion-compensating fiber is pumped such that the noise contribution of the dispersion-compensating fiber is reduced.Type: ApplicationFiled: April 27, 2001Publication date: October 31, 2002Inventors: Glenn Bartolini, Graeme Pendock, John Zyskind