Patents by Inventor Doruk Engin
Doruk Engin 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: 6727991Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: GrantFiled: July 15, 2002Date of Patent: April 27, 2004Assignee: Alphion CorporationInventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Patent number: 6724484Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: GrantFiled: July 15, 2002Date of Patent: April 20, 2004Assignee: Alphion CorporationInventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Patent number: 6678086Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: GrantFiled: July 15, 2002Date of Patent: January 13, 2004Assignee: Alphion CorporationInventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Patent number: 6671467Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: GrantFiled: July 15, 2002Date of Patent: December 30, 2003Assignee: Alphion CorporationInventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Roanld Simprini, Boris Stefanov, Tan Buu Thai
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Patent number: 6646794Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: GrantFiled: July 15, 2002Date of Patent: November 11, 2003Assignee: Alphion CorporationInventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Bharat Dave, Ronald Simprini, Boris Stefanov, Tan Thai
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Patent number: 6636318Abstract: A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted from the output of the AO2R by the AOCR clock recovery module. The output is the recovered clock signal gated by the regenerated and reshaped input signal, and a monitor circuit is used to set the optimum operations of the retiming device. In a first embodiment the output of the AOR retiming device is fed to an AOC code and wavelength conversion output stage, which returns the signal to the NRZ coding, on a service wavelength converted to match the fixed wavelength connection with the DWDM transmission system. In a second embodiment the code conversion is incorporated into the AOR retiming device, and wavelength conversion is accomplished in the AOCR clock recovery device.Type: GrantFiled: October 5, 2001Date of Patent: October 21, 2003Assignee: Alphion Corp.Inventors: Jithamithra Sarathy, Bharat Dave, Boris Stefanov, Ronald Simprini, Tan B. Thai, Roman Antosik, Aleksandr Miglo, Olga Nedzhvetska, Kwang Kim, Doruk Engin
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Patent number: 6624924Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: GrantFiled: July 15, 2002Date of Patent: September 23, 2003Assignee: Alphion Corp.Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Patent number: 6594072Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: GrantFiled: July 15, 2002Date of Patent: July 15, 2003Assignee: Alphion CorporationInventors: Bharat Dave, Doruk Engin, Kwang Kim, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Patent number: 6570697Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: GrantFiled: May 4, 2001Date of Patent: May 27, 2003Assignee: Alphion CorporationInventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Patent number: 6563621Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: GrantFiled: May 4, 2001Date of Patent: May 13, 2003Assignee: Alphion CorporationInventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Publication number: 20020181083Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Publication number: 20020181087Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Publication number: 20020181085Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Publication number: 20020181084Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai
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Publication number: 20020181088Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Publication number: 20020181086Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: ApplicationFiled: July 15, 2002Publication date: December 5, 2002Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Publication number: 20020176157Abstract: A method and circuit are presented for the all optical recovery of the clock signal from an arbitrary optical data signal. The method involves two stages. A first stage preprocesses the optical signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The output of the preprocessing stage is fed to a clock recovery stage, which consists of a symmetric interferometer that locks on to the inherent clock signal by using the second stage input signal to trigger two optical sources to self oscillate at the clock rate. In a preferred embodiment the second stage is implemented via SOAs integrated in the arms of an interferometer, with two DFB lasers as terminuses. The output of the interferometer is an optical clock signal at the clock rate of the original input.Type: ApplicationFiled: July 15, 2002Publication date: November 28, 2002Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nedzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai
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Patent number: 6465153Abstract: Advantageous methodologies are disclosed for embedding periodic patterns in optical waveguide elements such as optical fibers. Polarization independence in an elongated waist region of a coupler can be established by measuring polarization characteristics during fusion and elongation, and controlling the heating and stretching to impart a cross-sectional shape, such as a hybrid dumbbell-ellipsoid produces a polarization insensitive drop wavelength. Alternatively, or additionally, polarization dependence can be minimized by angular deformation of the elements along its light transmissive axis. In addition, an element of relatively low photosensitivity is held in an hydrogen or deuterium environment pressurized to about 1000 to 5000 psi. While the environment is pressurized, a scanning UV beam is transmitted through a photomask and impinges on the coupler waist. In writing the grating, the in-diffused gas is constantly replenished, enabling the grating to grow.Type: GrantFiled: October 31, 2000Date of Patent: October 15, 2002Assignee: Arroyo Optics, Inc.Inventors: Anthony S. Kewitsch, George A. Rakuljic, Doruk Engin, Seth J. Greenberg, Phil A. Willems, Xiaolin Tong
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Publication number: 20020079486Abstract: A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted from the output of the AO2R by the AOCR clock recovery module. The output is the recovered clock signal gated by the regenerated and reshaped input signal, and a monitor circuit is used to set the optimum operations of the retiming device. In a first embodiment the output of the AOR retiming device is fed to an AOC code and wavelength conversion output stage, which returns the signal to the NRZ coding, on a service wavelength converted to match the fixed wavelength connection with the DWDM transmission system. In a second embodiment the code conversion is incorporated into the AOR retiming device, and wavelength conversion is accomplished in the AOCR clock recovery device.Type: ApplicationFiled: October 5, 2001Publication date: June 27, 2002Inventors: Jithamithra Sarathy, Bharat Dave, Boris Stefanov, Ronald Simprini, Tan B. Thai, Roman Antosik, Aleksandr Miglo, Olga Nedzhvetska, Kwang Kim, Doruk Engin
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Publication number: 20020041428Abstract: A method and circuit are presented for an all-optical format independent preprocessor that processes an arbitrary optical input signal by converting a NRZ signal to a PRZ signal, or if the input optical signal is RZ, by merely amplifying it. The method involves subtracting a delayed copy of the signal from the original, thereby effectively doubling its frequency, and inserting a pulse at each transition of the original signal, whether rising or falling. In a preferred embodiment this stage is implemented via an integrated SOA in each arm of an asymmetric interferometric device. The asymmetry consists of a delay element in one arm. In a preferred embodiment the entire device is fabricated on a semiconductor substrate, allowing for compactness as well as minimization of interconnectivity losses and overall power consumption. The output of the preprocessor, having a significant frequency component at its original clock rate, can then be fed to a clock recovery stage for all-optical clock recovery.Type: ApplicationFiled: May 4, 2001Publication date: April 11, 2002Inventors: Julio Martinez, Kwang Kim, Olga Nedzhvetskaya, Doruk Engin, Jiten Sarathy, Roman Antosik, Bharat Dave, Michael Evans, David Lidsky, Ronald Simprini, Boris Stefanov, Tan Thai