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: 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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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: 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: 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: 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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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
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Publication number: 20090322448Abstract: A tamable 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: ApplicationFiled: May 2, 2007Publication date: December 31, 2009Applicant: CORNELL RESEARCH FOUNDATION, INC.Inventors: Sunil Bhave, Lih Feng Cheow
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Publication number: 20070103258Abstract: A MEMS filter has an input layer for receiving a signal input, and an output layer for providing a signal output. The MEMS filter also has a first resonator and a second resonator coupled to the first resonator such that movement transduced in the first resonator by the signal input causes movement of the second resonator which transduces the signal output. A method of manufacturing a MEMS filter is also disclosed. A dielectric layer is formed on a base. A patterned electrode layer is formed at least in part on the dielectric layer. The base is etched to define a resonator structure. A method of adjusting a desired input impedance and an output impedance of a dielectrically transduced MEMS filter having transduction electrodes coupled to a dielectric film is further disclosed. The method includes adjusting a DC bias voltage on the transduction electrodes.Type: ApplicationFiled: November 3, 2006Publication date: May 10, 2007Inventors: Dana Weinstein, Sunil Bhave
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Publication number: 20060017523Abstract: An electrostatic transducer for micromechanical resonators, in which the electrode gaps are filled with a dielectric material having a much higher permittivity than air. This internal electrostatic transducer has several advantages over both air-gap electrostatic and piezoelectric transduction; including lower motional impedance, compatibility with advanced scaled CMOS device technology, and extended dynamic range. In one aspect, in order to minimize energy losses, the dielectric material has an acoustic velocity which is matched to that of the resonator material. Internal electrostatic transduction can be adapted to excite and detect either vertical modes (perpendicular to the substrate) or lateral modes (in the plane of the substrate). Its increased transduction efficiency is of particular importance for reducing the motional resistance of the latter.Type: ApplicationFiled: June 3, 2005Publication date: January 26, 2006Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Sunil Bhave, Roger Howe