Patents by Inventor Shervin Taghavi
Shervin Taghavi 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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Publication number: 20160146600Abstract: A simple and reliable novel method providing the ability to measure the spatial relative displacement and rotation of objects as well as the measurement of the different degrees of freedom of each object (i.e. rotations and translations) relative to an inertial frame. This novel technique relies on the measurement of the center of an energy pattern emanating from a source to a detector. Our technique can be used in diverse applications like remote sensing, as it applies to earth/planetary and geo sciences, oil/gas exploration, and mining, civil, structural, medical engineering, and homeland security & defense, among others.Type: ApplicationFiled: November 24, 2014Publication date: May 26, 2016Inventor: Shervin Taghavi Larigani
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Patent number: 9261625Abstract: A method and system provide the ability to measure relative displacement and rotation. A first light is continuously shined from a first light source that is fixed on a first entity to a first two-dimensional (2D) plate fixed on a second entity. The first direction of propagation of the first light does not change relative to the first entity. A second light is shined from a second light source that is fixed on the first entity to a second 2D plate fixed on the second entity. A second direction of propagation of the second light does not change relative to the first entity and is different from the first direction of propagation. The displacement of the lights on plates is directly monitored to determine a 3D displacement vector that represents a relative displacement between the first entity and the second entity. Thus, a three dimensional gravity gradient tensor is constructed.Type: GrantFiled: December 21, 2012Date of Patent: February 16, 2016Assignee: California Institute of TechnologyInventor: Shervin Taghavi Larigani
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Patent number: 8026768Abstract: Local magnetic field strength in a trapped ion atomic clock is measured in real time, with high accuracy and without degrading clock performance, and the measurement is used to compensate for ambient magnetic field perturbations. First and second isotopes of an element are co-located within the linear ion trap. The first isotope has a resonant microwave transition between two hyperfine energy states, and the second isotope has a resonant Zeeman transition. Optical sources emit ultraviolet light that optically pump both isotopes. A microwave radiation source simultaneously emits microwave fields resonant with the first isotope's clock transition and the second isotope's Zeeman transition, and an optical detector measures the fluorescence from optically pumping both isotopes.Type: GrantFiled: January 21, 2010Date of Patent: September 27, 2011Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Eric A. Burt, Shervin Taghavi, Robert L. Tjoelker
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Patent number: 7330246Abstract: Described is a tilt meter for monitoring angle shift in an incident signal. The tilt meter includes a resonator for receiving an incident signal from a signal transmitter and outputting a resonated signal. An incident angle exists between a plane normal to the resonator and the incident signal. A sensor is included for sensing the resonated signal. A processor is connected with the sensor and is configured to compare intensities of the incident signal and the resonated signal. Based upon the comparison, the processor determines if and by how much the incident angle has changed.Type: GrantFiled: April 5, 2006Date of Patent: February 12, 2008Assignee: California Institute of TechnologyInventors: Shervin Taghavi Larigani, Jakob J. van Zyl
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Patent number: 7151876Abstract: The invention discloses a semi-ring Fabry-Perot (SRFP) optical resonator structure comprising a medium including an edge forming a reflective facet and a waveguide within the medium, the waveguide having opposing ends formed by the reflective facet. The performance of the SRFP resonator can be further enhanced by including a Mach-Zehnder interferometer in the waveguide on one side of the gain medium. The optical resonator can be employed in a variety of optical devices. Laser structures using at least one SRFP resonator are disclosed where the resonators are disposed on opposite sides of a gain medium. Other laser structures employing one or more resonators on one side of a gain region are also disclosed.Type: GrantFiled: September 13, 2005Date of Patent: December 19, 2006Assignee: California Institute of TechnologyInventors: Shervin Taghavi-Larigani, Jakob J. Vanzyl, Amnon Yariv
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Publication number: 20060221327Abstract: Described is a tilt meter for monitoring angle shift in an incident signal. The tilt meter includes a resonator for receiving an incident signal from a signal transmitter and outputting a resonated signal. An incident angle exists between a plane normal to the resonator and the incident signal. A sensor is included for sensing the resonated signal. A processor is connected with the sensor and is configured to compare intensities of the incident signal and the resonated signal. Based upon the comparison, the processor determines if and by how much the incident angle has changed.Type: ApplicationFiled: April 5, 2006Publication date: October 5, 2006Inventors: Shervin Taghavi Larigani, Jakob van Zyl
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Publication number: 20060188200Abstract: The invention discloses a semi-ring Fabry-Perot (SRFP) optical resonator structure comprising a medium including an edge forming a reflective facet and a waveguide within the medium, the waveguide having opposing ends formed by the reflective facet. The performance of the SRFP resonator can be further enhanced by including a Mach-Zehnder interferometer in the waveguide on one side of the gain medium. The optical resonator can be employed in a variety of optical devices. Laser structures using at least one SRFP resonator are disclosed where the resonators are disposed on opposite sides of a gain medium. Other laser structures employing one or more resonators on one side of a gain region are also disclosed.Type: ApplicationFiled: September 13, 2005Publication date: August 24, 2006Applicant: California Institute of TechnologyInventors: Shervin Taghavi-Larigani, Jakob Vanzyl, Amnon Yariv
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Patent number: 7027476Abstract: Tunable semiconductor lasers are disclosed requiring minimized coupling regions. Multiple laser embodiments employ ring resonators or ring resonator pairs using only a single coupling region with the gain medium are detailed. Tuning can be performed by changing the phase of the coupling coefficient between the gain medium and a ring resonator of the laser. Another embodiment provides a tunable laser including two Mach-Zehnder interferometers in series and a reflector coupled to a gain medium.Type: GrantFiled: August 11, 2003Date of Patent: April 11, 2006Assignee: California Institute of TechnologyInventors: Shervin Taghavi-Larigani, Jakob J. Vanzyl, Amnon Yariv
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Patent number: 6999658Abstract: The invention discloses a semi-ring Fabry-Perot (SRFP) optical resonator structure comprising a medium including an edge forming a reflective facet and a waveguide within the medium, the waveguide having opposing ends formed by the reflective facet. The performance of the SRFP resonator can be further enhanced by including a Mach-Zehnder interferometer in the waveguide on one side of the gain medium. The optical resonator can be employed in a variety of optical devices. Laser structures using at least one SRFP resonator are disclosed where the resonators are disposed on opposite sides of a gain medium. Other laser structures employing one or more resonators on one side of a gain region are also disclosed.Type: GrantFiled: June 30, 2003Date of Patent: February 14, 2006Assignee: California Institute of TechnologyInventors: Shervin Taghavi-Larigani, Jakob J. Vanzyl, Amnon Yariv
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Publication number: 20040062483Abstract: The invention discloses a semi-ring Fabry-Perot (SRFP) optical resonator structure comprising a medium including an edge forming a reflective facet and a waveguide within the medium, the waveguide having opposing ends formed by the reflective facet. The performance of the SRFP resonator can be further enhanced by including a Mach-Zehnder interferometer in the waveguide on one side of the gain medium. The optical resonator can be employed in a variety of optical devices. Laser structures using at least one SRFP resonator are disclosed where the resonators are disposed on opposite sides of a gain medium. Other laser structures employing one or more resonators on one side of a gain region are also disclosed.Type: ApplicationFiled: June 30, 2003Publication date: April 1, 2004Inventors: Shervin Taghavi-Larigani, Jakob J. Vanzyl, Amnon Yariv
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Publication number: 20040032886Abstract: Tunable semiconductor lasers are disclosed requiring minimized coupling regions. Multiple laser embodiments employ ring resonators or ring resonator pairs using only a single coupling region with the gain medium are detailed. Tuning can be performed by changing the phase of the coupling coefficient between the gain medium and a ring resonator of the laser. Another embodiment provides a tunable laser including two Mach-Zehnder interferometers in series and a reflector coupled to a gain medium.Type: ApplicationFiled: August 11, 2003Publication date: February 19, 2004Applicant: California Institute of TechnologyInventors: Shervin Taghavi-Larigani, Jakob J. Vanzyl, Amnon Yariv