Patents by Inventor Sunil Bhave
Sunil Bhave 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: 20240322522Abstract: A frequency agile tunable self-injection locking laser system being formed by a laser device coupled to at least one optical resonator and method and controller therefor are disclosed. A diode current and an optical resonator are controllable. A self-injection locking range is selected and the self-injection locking range corresponds an optical feedback phase for back-reflected light from the optical resonator into the laser device. A diode current is set and a maximum tuning range of the actuation voltage in which self-injection locking is maintained is determined. The laser system is operated with actuation voltages in a range depending on the determined tuning range.Type: ApplicationFiled: November 4, 2021Publication date: September 26, 2024Applicants: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), PURDUE RESEARCH FOUNDATIONInventors: Tobias Kippenberg, Sunil Bhave, Hao Tian, Johann Riemensberger, Grigorii Likhachev, Anat Siddharth
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Publication number: 20240302682Abstract: The present invention relates to an electrically tunable photonic resonator device for a component having a fast and flat actuation response. The photonic resonator device includes at least one optical waveguide with an optical interface for coupling in laser light. The photonic resonator device includes at least one optical resonator including a waveguide made of an optical resonator material. A laser light coupled via the optical waveguide is coupled into at least one optical resonator. The photonic resonator device includes at least one piezo actuator to apply mechanical stress onto the optical resonator. The optical resonator, the piezo actuator, and the optical waveguide are monolithically integrated on a common substrate of the photonic resonator device. The photonic resonator device includes a mechanical mode suppression means configured to attenuate one or more mechanical modes of oscillation caused by an AC operation of the piezo actuator.Type: ApplicationFiled: March 12, 2021Publication date: September 12, 2024Applicants: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), PURDUE RESEARCH FOUNDATIONInventors: Tobias Kippenberg, Sunil Bhave, Hao Tian, Johann Riemensberger, Grigorii Likhachev, Anat Siddharth
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Patent number: 11699989Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: GrantFiled: November 3, 2022Date of Patent: July 11, 2023Assignee: Purdue Research FoundationInventors: Sunil A Bhave, Pen-Li Yu
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Publication number: 20230054876Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: ApplicationFiled: November 3, 2022Publication date: February 23, 2023Applicant: Purdue Research FoundationInventors: Sunil A. Bhave, Pen-Li Yu
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Patent number: 11566900Abstract: A sensor for measuring rate of rotation is disclosed which includes a disk resonator, an anchor coupled to the disk resonator and further coupled to a substrate, and an optical waveguide wrapping around at least a portion of the perimeter of the disk resonator, the optical waveguide having an input end and an output end, wherein the disk resonator is configured to expand radially when subject to a rotational input, and wherein said radial expansion is adapted to cause a change in an optical signal passing through the optical waveguide.Type: GrantFiled: March 5, 2020Date of Patent: January 31, 2023Assignee: Purdue Research FoundationInventor: Sunil Bhave
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Patent number: 11496115Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: GrantFiled: August 20, 2019Date of Patent: November 8, 2022Assignee: Purdue Research FoundationInventors: Sunil A Bhave, Pen-Li Yu
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Publication number: 20210058061Abstract: A piezoelectric structure is disclosed which includes a single crystal having piezoelectric coefficients d31 and d32 of opposite magnitude, such that when an alternating electric field is applied in the Z direction, the piezoelectric structure expands in one of the X and Y directions and contracts in the other of the X and Y direction, a first electrode coupled to the single crystal, and a second electrode coupled to the single crystal, wherein the alternating electric field is input to the single crystal through the first and second electrodes.Type: ApplicationFiled: August 20, 2019Publication date: February 25, 2021Applicant: Purdue Research FoundationInventors: Sunil A. Bhave, Pen-Li Yu
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Publication number: 20200284584Abstract: A sensor for measuring rate of rotation is disclosed which includes a disk resonator, an anchor coupled to the disk resonator and further coupled to a substrate, and an optical waveguide wrapping around at least a portion of the perimeter of the disk resonator, the optical waveguide having an input end and an output end, wherein the disk resonator is configured to expand radially when subject to a rotational input, and wherein said radial expansion is adapted to cause a change in an optical signal passing through the optical waveguide.Type: ApplicationFiled: March 5, 2020Publication date: September 10, 2020Applicant: Purdue Research FoundationInventor: Sunil Bhave
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Patent number: 10705223Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.Type: GrantFiled: November 13, 2018Date of Patent: July 7, 2020Assignee: Cornell UniversityInventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
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Publication number: 20190317222Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.Type: ApplicationFiled: November 13, 2018Publication date: October 17, 2019Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
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Patent number: 10126428Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.Type: GrantFiled: February 25, 2013Date of Patent: November 13, 2018Assignee: Cornell UniversityInventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
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Patent number: 9528829Abstract: Gyroscopes based on optomechanical designs to provide sensitive sensing while providing relatively large bandwidth and dynamic range with enhanced noise performance.Type: GrantFiled: July 16, 2012Date of Patent: December 27, 2016Assignee: CORNELL UNIVERSITYInventors: Sunil Bhave, Renyuan Wang
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Patent number: 9069004Abstract: Methods, structures, devices and systems are disclosed for implementing optomechanical sensors in various configurations by using two optically coupled optical resonators or cavities that can be move or deform relative to each other. The optical coupling between first and second optical cavities to produce an optical resonance that varies with a spacing between the first and second optical cavities and provide the basis for the optomechanical sensing. Compact and integrated optomechanical sensors can be constructed to provide sensitive measurements for a range of applications, including motion sensing and other sensing applications.Type: GrantFiled: October 8, 2012Date of Patent: June 30, 2015Assignee: Cornell UniversityInventors: Sunil A. Bhave, David Neil Hutchison
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Patent number: 9036951Abstract: An electro-optic structure, which may comprise an acousto-optic modulator for use in an opto-acoustic oscillator, comprises a plurality of rigidly connected resonator core components located movably separated over a substrate and anchored to the substrate at an anchor point. An actuator electrode is located separated from a first one of the rigidly connected resonator core components and an optical waveguide is located separated from a second one of the rigidly connected resonator core components. Radio frequency and direct current actuation of the actuator electrode provides a mechanical vibration in the first rigidly connected resonator core component that is mechanically coupled to the second rigidly connected resonator core component which serves to optically modulate light transported through the wave guide. Reverse operation is also contemplated. Embodiments also contemplate a third rigidly connected resonator core component as a radiation pressure driven detector.Type: GrantFiled: July 24, 2012Date of Patent: May 19, 2015Assignee: CORNELL UNIVERSITYInventors: Sunil Bhave, Suresh Sridaran
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Publication number: 20150022397Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.Type: ApplicationFiled: February 25, 2013Publication date: January 22, 2015Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
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Publication number: 20140283601Abstract: Methods, structures, devices and systems are disclosed for implementing optomechanical sensors in various configurations by using two optically coupled optical resonators or cavities that can be move or deform relative to each other. The optical coupling between first and second optical cavities to produce an optical resonance that varies with a spacing between the first and second optical cavities and provide the basis for the optomechanical sensing. Compact and integrated optomechanical sensors can be constructed to provide sensitive measurements for a range of applications, including motion sensing and other sensing applications.Type: ApplicationFiled: October 8, 2012Publication date: September 25, 2014Inventors: Sunil A. Bhave, David Neil Hutchison
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Publication number: 20140260614Abstract: Gyroscopes based on optomechanical designs to provide sensitive sensing while providing relatively large bandwidth and dynamic range with enhanced noise performance.Type: ApplicationFiled: July 16, 2012Publication date: September 18, 2014Applicant: CORNELL UNIVERSITYInventors: Sunil Bhave, Renyuan Wang
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Patent number: 8624337Abstract: A resonator body has an inversion gate, an accumulation gate, and a center region. The resonator body also has a source contact coupled to the center region and a drain contact coupled to the center region. The resonator body further has a first dielectric layer coupled between the inversion gate and the center region. The resonator body also has a second dielectric layer coupled between the accumulation gate and the center region. A resonant body transistor is also disclosed. The resonant body transistor has an inversion gate electrode, an accumulation gate electrode, a source electrode, a drain electrode, and a plurality of anchor beams. The resonant body transistor also has a resonator body coupled-to and suspended-from the inversion gate electrode, the accumulation gate electrode, the source electrode, and the drain electrode by the plurality of anchor beams. A resonant body oscillator is also disclosed.Type: GrantFiled: December 11, 2008Date of Patent: January 7, 2014Assignee: Cornell UniversityInventors: Dana Weinstein, Sunil A. Bhave
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Publication number: 20120294564Abstract: An electro-optic structure, which may comprise an acousto-optic modulator for use in an opto-acoustic oscillator, comprises a plurality of rigidly connected resonator core components located movably separated over a substrate and anchored to the substrate at an anchor point. An actuator electrode is located separated from a first one of the rigidly connected resonator core components and an optical waveguide is located separated from a second one of the rigidly connected resonator core components. Radio frequency and direct current actuation of the actuator electrode provides a mechanical vibration in the first rigidly connected resonator core component that is mechanically coupled to the second rigidly connected resonator core component which serves to optically modulate light transported through the wave guide. Reverse operation is also contemplated. Embodiments also contemplate a third rigidly connected resonator core component as a radiation pressure driven detector.Type: ApplicationFiled: July 24, 2012Publication date: November 22, 2012Applicant: Cornell University - Cornell Center for Technology Enterprise & Commercialzation (CCTEC)Inventors: Sunil Bhave, Suresh Sridaran
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Patent number: 8111114Abstract: A tunable MEMS filter is disclosed, having a substrate with first and second isolated substrate areas. First and second anchor points are coupled to the substrate. A base is coupled to the first and second anchor points by first and second coupling beams, respectively. A dielectric layer is coupled to the base. An input conductor is coupled to the at least one dielectric layer. An output conductor is coupled to the at least one dielectric layer. A method of tuning a center frequency and a bandwidth of a MEMS resonator filter is also disclosed. A first bias voltage is adjusted between a base layer and input and output conductor layers. A second bias voltage is adjusted between the base layer and isolated substrate areas. The center frequency and the bandwidth are determined until the adjustments to the bias voltages provide a desired center frequency and a desired bandwidth.Type: GrantFiled: May 2, 2007Date of Patent: February 7, 2012Assignee: Cornell Center for Technology, Enterprise & CommericializationInventors: Sunil Bhave, Lih Feng Cheow