Patents by Inventor Vladimir Marko Stojanovic
Vladimir Marko Stojanovic 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: 11988938Abstract: An optical modulator is disclosed that includes an optical resonator structure. The optical resonator structure includes at least one non-linear portion, the at least one non-linear portion comprising at least one radial junction region. The at least one radial junction region is formed between at least first and second materials, respectively, having different electronic conductivity characteristics. A principal axis of the at least one radial junction region is oriented along a radius of curvature of the at least one non-linear portion. The optical modulator includes an optical waveguide that is coupled to the at least one non-linear portion of the optical resonator structure.Type: GrantFiled: April 26, 2021Date of Patent: May 21, 2024Assignees: Massachusetts Institute of Technology, University of ColoradoInventors: Milos A. Popovic, Jeffrey Michael Shainline, Jason Orcutt, Vladimir Marko Stojanovic
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Publication number: 20210373413Abstract: An optical modulator is disclosed that includes an optical resonator structure. The optical resonator structure includes at least one non-linear portion, the at least one non-linear portion comprising at least one radial junction region. The at least one radial junction region is formed between at least first and second materials, respectively, having different electronic conductivity characteristics. A principal axis of the at least one radial junction region is oriented along a radius of curvature of the at least one non-linear portion. The optical modulator includes an optical waveguide that is coupled to the at least one non-linear portion of the optical resonator structure.Type: ApplicationFiled: April 26, 2021Publication date: December 2, 2021Inventors: Milos A. Popovic, Jeffrey Michael Shainline, Jason Orcutt, Vladimir Marko Stojanovic
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Patent number: 10996538Abstract: An optical modulator is disclosed that includes an optical resonator structure. The optical resonator structure includes at least one non-linear portion, the at least one non-linear portion comprising at least one radial junction region. The at least one radial junction region is formed between at least first and second materials, respectively, having different electronic conductivity characteristics. A principal axis of the at least one radial junction region is oriented along a radius of curvature of the at least one non-linear portion. The optical modulator includes an optical waveguide that is coupled to the at least one non-linear portion of the optical resonator structure.Type: GrantFiled: June 12, 2014Date of Patent: May 4, 2021Assignees: Massachusetts Institute of Technology, University of ColoradoInventors: Milos A. Popovic, Jeffrey Michael Shainline, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Patent number: 10587344Abstract: Devices and techniques for integrated optical data communication. A method of encoding symbols in an optical signal may include encoding a first symbol by injecting charge carriers, at a first rate, into a semiconductor device, such as a PIN diode. The method may also include encoding a second symbol by injecting charge carriers, at a second rate, into the semiconductor device. The first rate may exceed the second rate. A modulator driver circuit may include a resistive circuit coupled between supply terminal and drive terminals. The modulator driver circuit may also include a control circuit coupled between a data terminal and the resistive circuit. The control circuit may modulate a resistance of the resistive circuit by selectively coupling one or more of a plurality of portions of the resistive circuit to the drive terminal based on data to be optically encoded.Type: GrantFiled: October 3, 2018Date of Patent: March 10, 2020Assignee: Massachusetts Institute of TechnologyInventors: Benjamin Roy Moss, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Patent number: 10514509Abstract: An optical coupler has a waveguide coupled to a grating of multiple scattering units, each scattering unit having a first scattering element formed of a shape in a polysilicon gate layer and a second scattering element formed of a shape in a body silicon layer of a metal-oxide-semiconductor (MOS) integrated circuit (IC). The couplers may be used in a system having a coupler on each of a first and second IC, infrared light being formed into a beam passing between the couplers. Vias may be interposed in third ICs between the first and second ICs. The couplers may be configured with nonuniform width of scattering elements to produce Gaussian or focused beams.Type: GrantFiled: January 10, 2014Date of Patent: December 24, 2019Assignees: The Regents of the University of Colorado, a Body Corporate, Massachusetts Institute of TechnologyInventors: Milos Popovic, Vladimir Marko Stojanovic, Jason Scott Orcutt
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Publication number: 20190149240Abstract: Devices and techniques for integrated optical data communication. A method of encoding symbols in an optical signal may include encoding a first symbol by injecting charge carriers, at a first rate, into a semiconductor device, such as a PIN diode. The method may also include encoding a second symbol by injecting charge carriers, at a second rate, into the semiconductor device. The first rate may exceed the second rate. A modulator driver circuit may include a resistive circuit coupled between supply terminal and drive terminals. The modulator driver circuit may also include a control circuit coupled between a data terminal and the resistive circuit. The control circuit may modulate a resistance of the resistive circuit by selectively coupling one or more of a plurality of portions of the resistive circuit to the drive terminal based on data to be optically encoded.Type: ApplicationFiled: October 3, 2018Publication date: May 16, 2019Applicant: Massachusetts Institute of TechnologyInventors: Benjamin Roy Moss, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Patent number: 10135539Abstract: Devices and techniques for integrated optical data communication. A method of encoding symbols in an optical signal may include encoding a first symbol by injecting charge carriers, at a first rate, into a semiconductor device, such as a PIN diode. The method may also include encoding a second symbol by injecting charge carriers, at a second rate, into the semiconductor device. The first rate may exceed the second rate. A modulator driver circuit may include a resistive circuit coupled between supply terminal and drive terminals. The modulator driver circuit may also include a control circuit coupled between a data terminal and the resistive circuit. The control circuit may modulate a resistance of the resistive circuit by selectively coupling one or more of a plurality of portions of the resistive circuit to the drive terminal based on data to be optically encoded.Type: GrantFiled: February 15, 2013Date of Patent: November 20, 2018Assignee: Massachusetts Institute of TechnologyInventors: Benjamin Roy Moss, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Patent number: 9768881Abstract: Devices and techniques for integrated optical data communication. An optical receiver may include a photodetector and a differential amplifier. The photodetector is coupled to an optical waveguide. The optical waveguide is configured to provide an optical signal encoding data. A first terminal of the differential amplifier is coupled to receive a photodetection signal from the photodetector. A second terminal of the differential amplifier is coupled to receive, from a noise measurement unit, a reference signal representing a noise component of the photodetection signal. The differential amplifier is configured to provide an amplifier signal encoding at least some of the data.Type: GrantFiled: March 15, 2013Date of Patent: September 19, 2017Assignee: Massachusetts Institute of TechnologyInventors: Michael Stephen Georgas, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Patent number: 9595920Abstract: Digital compensators for use in outphasing-based power amplification systems (e.g., Linear Amplification using Nonlinear Components (LINC) amplifiers and Asymmetric Multilevel Outphasing (AMO) amplifiers) include a short memory nonlinear portion and a long memory linear time invariant (LTI) portion. In various embodiments, compensators are provided that are of relatively low complexity and that are capable of operation at throughputs exceeding a Gigasample per second.Type: GrantFiled: March 13, 2014Date of Patent: March 14, 2017Assignee: Massachusette Institute of TechnologyInventors: Yan Li, Zhipeng Li, Alexandre Megretski, Vladimir Marko Stojanovic, Omer Tanovic, Yehuda Avniel
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Publication number: 20160139487Abstract: An optical modulator is disclosed that includes an optical resonator structure. The optical resonator structure includes at least one non-linear portion, the at least one non-linear portion comprising at least one radial junction region. The at least one radial junction region is formed between at least first and second materials, respectively, having different electronic conductivity characteristics. A principal axis of the at least one radial junction region is oriented along a radius of curvature of the at least one non-linear portion. The optical modulator includes an optical waveguide that is coupled to the at least one non-linear portion of the optical resonator structure.Type: ApplicationFiled: June 12, 2014Publication date: May 19, 2016Applicants: Massachusetts Institute of Technology, University of ColoradoInventors: Milos A. Popovic, Jeffrey Michael Shainline, Jason Orcutt, Vladimir Marko Stojanovic
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Patent number: 9252712Abstract: Described herein is a fixed-point piece-wise linear (FP PWL) approximation technique for computations of nonlinear functions. The technique results in circuit designs having relatively few and simple arithmetic operations, short arithmetic operands and small-sized look-up tables and the circuits resultant there from can be efficiently pipelined to run at multi-GSamples/s throughputs. In one exemplary embodiment, the FP PWL approximation technique was used in the design of an energy-efficient high-throughput and high-precision signal component separator (SCS) for use with in an asymmetric-multilevel-outphasing (AMO) power amplifier. The FP PWL approximation technique is appropriate for use in any application requiring high-throughput, area and power constrained hardware implementations of nonlinear functions.Type: GrantFiled: May 10, 2013Date of Patent: February 2, 2016Assignee: Massachusetts Institute of TechnologyInventors: Yan Li, Zhipeng Li, Yehuda Avniel, Alexandre Megretski, Vladimir Marko Stojanovic
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Publication number: 20160013867Abstract: Devices and techniques for integrated optical data communication. A method of encoding symbols in an optical signal may include encoding a first symbol by injecting charge carriers, at a first rate, into a semiconductor device, such as a PIN diode. The method may also include encoding a second symbol by injecting charge carriers, at a second rate, into the semiconductor device. The first rate may exceed the second rate. A modulator driver circuit may include a resistive circuit coupled between supply terminal and drive terminals. The modulator driver circuit may also include a control circuit coupled between a data terminal and the resistive circuit. The control circuit may modulate a resistance of the resistive circuit by selectively coupling one or more of a plurality of portions of the resistive circuit to the drive terminal based on data to be optically encoded.Type: ApplicationFiled: February 15, 2013Publication date: January 14, 2016Applicant: Massachusetts Institute of TechnologyInventors: Benjamin Roy Moss, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Publication number: 20150357975Abstract: Digital compensators for use in outphasing-based power amplification systems (e.g., Linear Amplification using Nonlinear Components (LINC) amplifiers and Asymmetric Multilevel Outphasing (AMO) amplifiers) include a short memory nonlinear portion and a long memory linear time invariant (LTI) portion. In various embodiments, compensators are provided that are of relatively low complexity and that are capable of operation at throughputs exceeding a Gigasample per second.Type: ApplicationFiled: March 13, 2014Publication date: December 10, 2015Inventors: Yehuda AVNIEL, Yan LI, Zhipeng LI, Alexandre MEGRETSKI, Vladimir Marko STOJANOVIC, Omer TANOVIC
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Publication number: 20150311982Abstract: Devices and techniques for integrated optical data communication. An optical receiver may include a photodetector and a differential amplifier. The photodetector is coupled to an optical waveguide. The optical waveguide is configured to provide an optical signal encoding data. A first terminal of the differential amplifier is coupled to receive a photodetection signal from the photodetector. A second terminal of the differential amplifier is coupled to receive, from a noise measurement unit, a reference signal representing a noise component of the photodetection signal. The differential amplifier is configured to provide an amplifier signal encoding at least some of the data.Type: ApplicationFiled: March 15, 2013Publication date: October 29, 2015Applicant: Massachusetts Institute of TechnologyInventors: Michael Stephen Georgas, Jason Scott Orcutt, Vladimir Marko Stojanovic
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Publication number: 20150124907Abstract: Described herein is a fixed-point piece-wise linear (FP PWL) approximation technique for computations of nonlinear functions. The technique results in circuit designs having relatively few and simple arithmetic operations, short arithmetic operands and small-sized look-up tables and the circuits resultant there from can be efficiently pipelined to run at multi-GSamples/s throughputs. In one exemplary embodiment, the FP PWL approximation technique was used in the design of an energy-efficient high-throughput and high-precision signal component separator (SCS) for use with in an asymmetric-multilevel-outphasing (AMO) power amplifier. The FP PWL approximation technique is appropriate for use in any application requiring high-throughput, area and power constrained hardware implementations of nonlinear functions.Type: ApplicationFiled: May 5, 2013Publication date: May 7, 2015Applicant: Massachusetts Institute of TechnologyInventors: Yan Li, Zhipeng Li, Yehuda Avniel, Alexandre Megretski, Vladimir Marko Stojanovic