Patents by Inventor Tan Buu Thai
Tan Buu Thai 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: 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: 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: 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: 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: 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: 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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Publication number: 20020040980Abstract: 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: May 4, 2001Publication date: April 11, 2002Inventors: Bharat Dave, Doruk Engin, Kwang Kim, Mohammad Laham, Julio Martinez, Olga Nadzhvetskaya, Jithamithra Sarathy, Ronald Simprini, Boris Stefanov, Tan Buu Thai