Patents by Inventor Alessandro Cavaciuti
Alessandro Cavaciuti 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: 11601204Abstract: A method is provided for assessing the quality of an optical transmitter and/or its interoperability with a receiver. The method includes obtaining an optical signal output by an optical transmitter and performing coherent optical-to-electrical detection of the optical signal to produce an in-phase receive signal and a quadrature receive signal. The method further includes a computing device emulating a worst-case configuration of an optical fiber with which the optical transmitter is to be used, based on the in-phase receive signal and the quadrature receive signal to produce a noise contribution associated with the worst-case characteristics of the optical fiber and determining a figure of merit of the optical transmitter based on the noise contribution.Type: GrantFiled: July 16, 2021Date of Patent: March 7, 2023Assignee: CISCO TECHNOLOGY, INC.Inventors: Fabio Bottoni, Alessandro Cavaciuti
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Publication number: 20230013373Abstract: A method is provided for assessing the quality of an optical transmitter and/or its interoperability with a receiver. The method includes obtaining an optical signal output by an optical transmitter and performing coherent optical-to-electrical detection of the optical signal to produce an in-phase receive signal and a quadrature receive signal. The method further includes a computing device emulating a worst-case configuration of an optical fiber with which the optical transmitter is to be used, based on the in-phase receive signal and the quadrature receive signal to produce a noise contribution associated with the worst-case characteristics of the optical fiber and determining a figure of merit of the optical transmitter based on the noise contribution.Type: ApplicationFiled: July 16, 2021Publication date: January 19, 2023Inventors: Fabio Bottoni, Alessandro Cavaciuti
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Patent number: 11336378Abstract: Presented herein are methodologies for using legacy optical fiber for 10 Gigabit Ethernet or higher data rates. The methodology includes obtaining an electrical signal derived from optical-to-electrical conversion of an optical signal that was transmitted over, and received from, an optical fiber; and applying an equalization process to the electrical signal, wherein the equalization process is of a type that is designed to equalize received signals that were transmitted via a copper cable.Type: GrantFiled: April 17, 2020Date of Patent: May 17, 2022Assignee: CISCO TECHNOLOGY, INC.Inventors: Fabio Bottoni, Alessandro Cavaciuti
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Publication number: 20210328684Abstract: Presented herein are methodologies for using legacy optical fiber for 10 Gigabit Ethernet or higher data rates. The methodology includes obtaining an electrical signal derived from optical-to-electrical conversion of an optical signal that was transmitted over, and received from, an optical fiber; and applying an equalization process to the electrical signal, wherein the equalization process is of a type that is designed to equalize received signals that were transmitted via a copper cable.Type: ApplicationFiled: April 17, 2020Publication date: October 21, 2021Inventors: Fabio Bottoni, Alessandro Cavaciuti
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Patent number: 11005609Abstract: In one embodiment an apparatus, method, and system is described, the embodiment an apparatus, method including receiving a stream of data frames at an input interface, the data frames one of including security frames, or being included in security frames, wherein the security frames include payload data, performing forward error correction on the data frames a forward error correction (FEC) decoder, buffering received data frames at a buffer and blanker engine and building a complete security frame of the received data frames, determining whether or not to suppress taking a consequent action based on a frequency of authentication errors at an authentication engine, wherein the consequent action to be taken or suppressed, when taken, is taken upon payload data of one or more security frames including a data frame upon which an authentication error occurred. Related apparatus, methods and systems are also described.Type: GrantFiled: October 30, 2019Date of Patent: May 11, 2021Assignee: CISCO TECHNOLOGY, INC.Inventors: Stefan Langenbach, Gilberto Loprieno, Alessandro Cavaciuti
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Publication number: 20200067660Abstract: In one embodiment an apparatus, method, and system is described, the embodiment an apparatus, method including receiving a stream of data frames at an input interface, the data frames one of including security frames, or being included in security frames, wherein the security frames include payload data, performing forward error correction on the data frames a forward error correction (FEC) decoder, buffering received data frames at a buffer and blanker engine and building a complete security frame of the received data frames, determining whether or not to suppress taking a consequent action based on a frequency of authentication errors at an authentication engine, wherein the consequent action to be taken or suppressed, when taken, is taken upon payload data of one or more security frames including a data frame upon which an authentication error occurred. Related apparatus, methods and systems are also described.Type: ApplicationFiled: October 30, 2019Publication date: February 27, 2020Inventors: Stefan Langenbach, Gilberto Loprieno, Alessandro Cavaciuti
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Patent number: 10505678Abstract: In one embodiment an apparatus, method, and system is described, the embodiment an apparatus, method including receiving a stream of data frames at an input interface, the data frames one of including security frames, or being included in security frames, wherein the security frames include payload data, performing forward error correction on the data frames a forward error correction (FEC) decoder, buffering received data frames at a buffer and blanker engine and building a complete security frame of the received data frames, determining whether or not to suppress taking a consequent action based on a frequency of authentication errors at an authentication engine, wherein the consequent action to be taken or suppressed, when taken, is taken upon payload data of one or more security frames including a data frame upon which an authentication error occurred. Related apparatus, methods and systems are also described.Type: GrantFiled: March 18, 2018Date of Patent: December 10, 2019Assignee: Cisco Technology, Inc.Inventors: Stefan Langenbach, Gilberto Loprieno, Alessandro Cavaciuti
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Publication number: 20190288803Abstract: In one embodiment an apparatus, method, and system is described, the embodiment an apparatus, method including receiving a stream of data frames at an input interface, the data frames one of including security frames, or being included in security frames, wherein the security frames include payload data, performing forward error correction on the data frames a forward error correction (FEC) decoder, buffering received data frames at a buffer and blanker engine and building a complete security frame of the received data frames, determining whether or not to suppress taking a consequent action based on a frequency of authentication errors at an authentication engine, wherein the consequent action to be taken or suppressed, when taken, is taken upon payload data of one or more security frames including a data frame upon which an authentication error occurred. Related apparatus, methods and systems are also described.Type: ApplicationFiled: March 18, 2018Publication date: September 19, 2019Inventors: Stefan LANGENBACH, Gilberto LOPRIENO, Alessandro CAVACIUTI
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Patent number: 8699871Abstract: Method and apparatus for operating for operating an optical network including a shared laser array are disclosed. An example apparatus includes include a first plurality of N lasers. Each laser of the first plurality of N lasers is configured to output a respective optical seed signal having a respective wavelength. The example apparatus further includes a first optical coupler coupled with the first plurality of N lasers. In the example embodiment, the first optical coupler is configured to multiplex the respective optical seed signals of the first plurality of N lasers onto a plurality of N optical fibers. In this example, each optical fiber of first plurality of N optical fibers transmits each of the respective optical seed signals produced by the plurality of N lasers to a respective distribution node for distribution to N respective optical network units, where the optical network units use the optical seed signals to seed respective optical transmitters located at the N optical network units.Type: GrantFiled: April 8, 2009Date of Patent: April 15, 2014Assignee: Cisco Technology, Inc.Inventors: Carlo Tosetti, Damiano Rossetti, Alessandro Cavaciuti
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Publication number: 20100260496Abstract: Method and apparatus for operating for operating an optical network including a shared laser array are disclosed. An example apparatus includes include a first plurality of N lasers. Each laser of the first plurality of N lasers is configured to output a respective optical seed signal having a respective wavelength. The example apparatus further includes a first optical coupler coupled with the first plurality of N lasers. In the example embodiment, the first optical coupler is configured to multiplex the respective optical seed signals of the first plurality of N lasers onto a plurality of N optical fibers. In this example, each optical fiber of first plurality of N optical fibers transmits each of the respective optical seed signals produced by the plurality of N lasers to a respective distribution node for distribution to N respective optical network units, where the optical network units use the optical seed signals to seed respective optical transmitters located at the N optical network units.Type: ApplicationFiled: April 8, 2009Publication date: October 14, 2010Inventors: Carlo Tosetti, Damiano Rossetti, Alessandro Cavaciuti
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Patent number: 6018404Abstract: A bidirectional optical amplifier, comprising a unidirectional optical amplifying unit having one amplification wavelength band; two input/output ports for at least two optical signals having opposite propagation directions, the signals having a first and a second wavelength respectively, which are distinct from each other and included in the amplification wavelength band; two first and two second wavelength-selective optical couplers, respectively having a first wavelength pass-band including said first wavelength and a second wavelength pass-band including said second wavelength, the first and second wavelength pass-bands being non-overlapping, wherein the amplifying unit is connected between two opposite nodes of an optical bridge circuit, and wherein at the nodes of said bridge circuit the first and second selective optical couplers are present and are disposed symmetrically with respect to the amplifying unit and to the input/output ports of the optical signals.Type: GrantFiled: January 21, 1999Date of Patent: January 25, 2000Assignee: Pirelli Cavi S.p.A.Inventors: Fausto Meli, Alessandro Cavaciuti
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Patent number: 5995259Abstract: A bidirectional optical amplifier, comprising a unidirectional optical amplifying unit having one amplification wavelength band; two input/output ports for at least two optical signals having opposite propagation directions, said signals having a first and a second wavelength respectively, which are distinct from each other and included in said amplification wavelength band; two first and two second wavelength-selective optical couplers, having a first wavelength pass-band including said first wavelength and a second wavelength pass-band including said second wavelength respectively, said first and second wavelength pass-bands being devoid of relative overlappings, wherein said amplifying unit is connected between two opposite nodes of an optical bridge circuit, and wherein at the nodes of said bridge circuit said first and second selective optical couplers are present, in which said first and second selective couplers are disposed symmetrically to said amplifying unit and to said input/output ports of said oType: GrantFiled: January 16, 1996Date of Patent: November 30, 1999Assignee: Pirelli Cavi S.p.A.Inventors: Fausto Meli, Alessandro Cavaciuti
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Patent number: 5416625Abstract: Optical demultiplexing system, wherein from an optical carrier modulated by a TDM data flow the wanted tributary is extracted as an optical signal. The system makes use of a semiconductor optical amplifier, whose gain is modulated due to saturation effect. The amplifier receives both the modulated optical carrier and one or a plurality of sampling optical carriers, with wavelengths different from that of the modulated carrier. One or a plurality of optical filters supply at the output the tributaries by extracting from the amplifier output the sampling carriers modulated by data signals.Type: GrantFiled: March 30, 1993Date of Patent: May 16, 1995Assignee: CSELT - Centro Studi E Laboratori Telecommunicazioni S.p.A.Inventors: Alessandro Cavaciuti, Mario Puleo