Patents by Inventor Andreas Bertold Leven
Andreas Bertold Leven 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: 8095019Abstract: A method and apparatus providing clock and data recovery within an optical receiver using three CMA FIR filters with different group delays where filter coefficients are adapted to provide for a filter exhibiting a group delay of one sample period from which symbols for further processing are provided.Type: GrantFiled: July 30, 2008Date of Patent: January 10, 2012Assignee: Alcatel LucentInventors: Noriaki Kaneda, Andreas Bertold Leven
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Patent number: 8073345Abstract: A method for determining symbols PSK modulated on an optical carrier includes interfering a first polarization component of the modulated optical carrier and a reference optical carrier in a first optical mixer and interfering the first polarization component of the modulated optical carrier and the reference with a different relative phase in a second optical mixer. The method also includes sampling the interfered carriers from the first optical mixer to produce first digital sampled values and sampling the interfered carriers from the second optical mixer to produce second digital sampled values. The first and second digital sampled values of a sampling period form a first complex sampling value thereof. The method also includes offsetting a phase of a complex signal value corresponding to each first complex sampling value to correct for a phase error caused by a frequency offset between the modulated and reference optical carriers.Type: GrantFiled: December 22, 2006Date of Patent: December 6, 2011Assignee: Alcatel LucentInventors: Young-Kai Chen, Noriaki Kaneda, Ut-Va Koc, Andreas Bertold Leven
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Patent number: 8070973Abstract: Apparatus including: a substrate layer having a substantially planar top surface; an optically conductive peak located and elongated on, and spanning a first thickness measured in a direction generally away from, the top surface; the optically conductive peak having first and second lateral walls each including distal and proximal lateral wall portions, the proximal lateral wall portions intersecting the top surface; and first and second sidewall layers located on the distal lateral wall portions, the sidewall layers not intersecting the top surface and spanning a second thickness that is less than the first thickness measured in the same direction.Type: GrantFiled: September 29, 2008Date of Patent: December 6, 2011Assignee: Alcatel LucentInventors: Young-Kai Chen, Andreas Bertold Leven, Yang Yang
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Patent number: 8055141Abstract: An apparatus and method for reducing electrical signal intermodulation by processing a balanced electrical signal in the optical domain in a manner adapted to reduce noise and second order intermodulation, and converting the processed optical signal back to an electrical domain signal with either a single or balanced (differential) outputs.Type: GrantFiled: December 17, 2007Date of Patent: November 8, 2011Assignee: Alcatel LucentInventors: Young-Kai Chen, Andreas Bertold Leven, Mahmoud Rasras, Kun-Yii Tu
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Patent number: 7747177Abstract: A receiver for coherent detection of a PSK modulated optical carrier includes an optical detector, digital-to-analog converters, and a digital module. The optical detector is configured to mix the modulated optical carrier with two phase components of a reference optical carrier and to produce analog output signals representative of optical signals produced by said mixing. The digital-to-analog converters are connected to receive the analog output signals and to produce digital signals from the received analog output signals. The digital module is connected to receive the digital signals and to perform one of compensating the received digital signals for a conjugate phase misalignment between the mixed components, extracting phase of the received digital signals, and estimating a frequency offset between the two carriers from the received digital signals.Type: GrantFiled: August 15, 2005Date of Patent: June 29, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Young-Kai Chen, Ut-Va Koc, Andreas Bertold Leven
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Publication number: 20100054761Abstract: An optical receiver has a monolithically integrated electrical and optical circuit that includes a substrate with a planar surface. Along the planar surface, the monolithically integrated electrical and optical circuit has an optical hybrid, one or more variable optical attenuators, and photodetectors. The optical hybrid is connected to receive light beams, to interfere light of said received light beams with a plurality of relative phases and to output said interfered light via optical outputs thereof. Each of the one or more variable optical attenuators connects between a corresponding one of the optical outputs and a corresponding one of the photodetectors.Type: ApplicationFiled: August 28, 2008Publication date: March 4, 2010Inventors: Young-Kai Chen, Christopher Richard Doerr, Vincent Etienne Houtsma, Ting-Chen Hu, Andreas Bertold Leven, David Thomas Neilson, Nils Guenter Weimann, Liming Zhang
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Publication number: 20100028011Abstract: A method and apparatus providing clock and data recovery within an optical receiver using three CMA FIR filters with different group delays where filter coefficients are adapted to provide for a filter exhibiting a group delay of one sample period from which symbols for further processing are provided.Type: ApplicationFiled: July 30, 2008Publication date: February 4, 2010Inventors: Noriaki Kaneda, Andreas Bertold Leven
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Publication number: 20090154940Abstract: An apparatus and method for reducing electrical signal intermodulation by processing a balanced electrical signal in the optical domain in a manner adapted to reduce noise and second order intermodulation, and converting the processed optical signal back to an electrical domain signal with either a single or balanced (differential) outputs.Type: ApplicationFiled: December 17, 2007Publication date: June 18, 2009Inventors: Young-Kai Chen, Andreas Bertold Leven, Mahmoud Rasras, Kun-Yii Tu
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Publication number: 20090146179Abstract: An apparatus includes a light detector. The light detector includes a substrate with a planar surface and an array of photodiodes located along the planar surface. Each photodiode has a sequence of different semiconductor layers stacked vertically over the planar surface. The photodiodes are electrically connected in series.Type: ApplicationFiled: December 21, 2007Publication date: June 11, 2009Inventors: Young-Kai Chen, Vincent Etienne Houtsma, Andreas Bertold Leven, Nils Guenter Weimann
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Publication number: 20090111201Abstract: Apparatus including: a substrate layer having a substantially planar top surface; an optically conductive peak located and elongated on, and spanning a first thickness measured in a direction generally away from, the top surface; the optically conductive peak having first and second lateral walls each including distal and proximal lateral wall portions, the proximal lateral wall portions intersecting the top surface; and first and second sidewall layers located on the distal lateral wall portions, the sidewall layers not intersecting the top surface and spanning a second thickness that is less than the first thickness measured in the same direction.Type: ApplicationFiled: September 29, 2008Publication date: April 30, 2009Applicant: Lucent Technologies Inc.Inventors: Young-Kai Chen, Andreas Bertold Leven, Yang Yang
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Patent number: 7471855Abstract: An optical integrated circuit comprises a semiconductor body, a semiconductor optical waveguide located on the body, and a bipolar phototransistor located on and optically coupled to the waveguide. In a preferred embodiment, the base region of the transistor is configured to absorb radiation propagating in the waveguide, but the emitter and collector regions are both configured not to absorb the propagating radiation. In a further preferred embodiment, the waveguide is configured to guide the radiation along a propagation axis therein, and the transistor makes an elongated footprint along the waveguide, the footprint being elongated along the direction of the propagation axis. In another preferred embodiment, the footprint is at least three times longer along the propagation axis than along a direction perpendicular thereto.Type: GrantFiled: July 13, 2005Date of Patent: December 30, 2008Assignee: Alcatel-Lucent USA Inc.Inventors: Young-Kai Chen, Vincent Etienne Houtsma, Andreas Bertold Leven, Nils Guenter Weimann
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Patent number: 7454112Abstract: Apparatus including: a substrate layer having a substantially planar top surface; an optically conductive peak located and elongated on, and spanning a first thickness measured in a direction generally away from, the top surface; the optically conductive peak having first and second lateral walls each including distal and proximal lateral wall portions, the proximal lateral wall portions intersecting the top surface; and first and second sidewall layers located on the distal lateral wall portions, the sidewall layers not intersecting the top surface and spanning a second thickness that is less than the first thickness measured in the same direction.Type: GrantFiled: March 31, 2006Date of Patent: November 18, 2008Assignee: Lucent Technologies Inc.Inventors: Young-Kai Chen, Andreas Bertold Leven, Yang Yang
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Publication number: 20080152361Abstract: A method for determining symbols PSK modulated on an optical carrier includes interfering a first polarization component of the modulated optical carrier and a reference optical carrier in a first optical mixer and interfering the first polarization component of the modulated optical carrier and the reference with a different relative phase in a second optical mixer. The method also includes sampling the interfered carriers from the first optical mixer to produce first digital sampled values and sampling the interfered carriers from the second optical mixer to produce second digital sampled values. The first and second digital sampled values of a sampling period form a first complex sampling value thereof. The method also includes offsetting a phase of a complex signal value corresponding to each first complex sampling value to correct for a phase error caused by a frequency offset between the modulated and reference optical carriers.Type: ApplicationFiled: December 22, 2006Publication date: June 26, 2008Inventors: Young-Kai Chen, Noriaki Kaneda, Ut-Va Koc, Andreas Bertold Leven