Patents by Inventor Peter Rakich
Peter Rakich 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: 11652330Abstract: An optical amplifier device employing a Mach-Zehnder Interferometer (MZI) that reduces the amount of residual pump power in the optical output of the amplifier is disclosed. The MZI amplifier employs two geometrically linear optical amplifier arms or two multi-spatial-mode racetrack optical amplifiers to amplify a signal with a pumping beam, with the signal output port having extremely low levels of residual pump power. The MZI optical amplifier is a silicon photonic integrated circuit, with all optical amplifiers, couplers, phase shifters, and optical attenuators formed of silicon photonic integrated circuit elements. The MZI optical amplifier may include one, two, or three MZI stages, and multiple MZI optical amplifiers may be used in parallel or sequentially to achieve higher overall signal gain or power. The MZI optical amplifier may employ Brillouin-scattering-based amplifiers, Raman-based integrated waveguide optical amplifiers, or Erbium-doped integrated waveguide optical amplifiers.Type: GrantFiled: November 16, 2020Date of Patent: May 16, 2023Assignees: National Technology & Engineering Solutions of Sandia, LLC, Yale UniversityInventors: Anthony L. Lentine, Michael Gehl, Peter Rakich, Shai Gertler, Nils Otterstrom
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Patent number: 11378741Abstract: Devices and systems for opto-acoustic signal processing are described herein. In one embodiment, the device may include a structure configured to laterally confine travelling acoustic phonons (hypersound) throughout, a first multimode optical waveguide embedded within the structure, and an acoustic phonon emitter within the structure, where the first multimode optical waveguide is selected to couple to the acoustic phonons (hypersound) confined within the structure. In one embodiment, the system may include a first light source optically coupled to a proximal end of the first multimode optical waveguide, the first light source emitting a probe wave having a frequency ?p(1), and a driver configured to drive the acoustic phonon emitter to emit acoustic phonons (hypersound).Type: GrantFiled: August 9, 2019Date of Patent: July 5, 2022Assignee: YALE UNIVERSITYInventors: Eric Kittlaus, Nils Otterstrom, Prashanta Kharel, Shai Gertler, Peter Rakich
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Patent number: 11101616Abstract: Techniques for producing a Brillouin laser are provided. According to some aspects, techniques are based on forward Brillouin scattering and a multimode acousto-optic waveguide in which light is scattered between optical modes of the waveguide via the Brillouin scattering. This process may transfer energy from a waveguide mode of pump light to a waveguide mode of Stokes light. This process may be referred to herein as Stimulated Inter-Modal Brillouin Scattering (SIMS). Since SIMS is based on forward Brillouin scattering, laser (Stokes) light may be output in a different direction than back toward the input pump light, and as such there is no need for a circulator or other non-reciprocal device to protect the pump light as in conventional devices.Type: GrantFiled: May 11, 2018Date of Patent: August 24, 2021Assignee: Yale UniversityInventors: Peter Rakich, Nils Thomas Otterstrom, Eric Andrew Kittlaus, Ryan Orson Behunin, Zheng Barton Wang
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Patent number: 11017310Abstract: Techniques for operating a mechanical oscillator as a quantum memory are described. According to some aspects, a qubit may be coupled to a piezoelectric material such that the electric field of the qubit causes stress within the piezoelectric material. The piezoelectric material may be in contact with a crystalline substrate forming an acoustic resonator such that the qubit couples to bulk acoustic waves in the crystalline substrate via its interaction with the piezoelectric material. According to some aspects, application of a suitable electromagnetic pulse to the qubit may cause an exchange of energy from the qubit to the acoustic phonon system and thereby transfer quantum information from the qubit to the phonon system.Type: GrantFiled: February 28, 2018Date of Patent: May 25, 2021Assignee: Yale UniversityInventors: Yiwen Chu, Prashanta Kharel, William Renninger, Luke Burkhart, Luigi Frunzio, Peter Rakich, Robert J. Schoelkopf, III
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Publication number: 20200234171Abstract: Techniques for operating a mechanical oscillator as a quantum memory are described. According to some aspects, a qubit may be coupled to a piezoelectric material such that the electric field of the qubit causes stress within the piezoelectric material. The piezoelectric material may be in contact with a crystalline substrate forming an acoustic resonator such that the qubit couples to bulk acoustic waves in the crystalline substrate via its interaction with the suitable electromagnetic pulse to the qubit may cause an exchange of energy from the qubit to the acoustic phonon system and thereby transfer quantum information from the qubit to the phonon system.Type: ApplicationFiled: February 28, 2018Publication date: July 23, 2020Applicant: Yale UniversityInventors: Yiwen Chu, Prashanta Kharel, William Renninger, Luke Burkhart, Luigi Frunzio, Peter Rakich, Robert J. Schoelkopf, III
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Publication number: 20200050030Abstract: Devices and systems for opto-acoustic signal processing are described herein. In one embodiment, the device may include a structure configured to laterally confine travelling acoustic phonons (hypersound) throughout, a first multimode optical waveguide embedded within the structure, and an acoustic phonon emitter within the structure, where the first multimode optical waveguide is selected to couple to the acoustic phonons (hypersound) confined within the structure. In one embodiment, the system may include a first light source optically coupled to a proximal end of the first multimode optical waveguide, the first light source emitting a probe wave having a frequency ?p(1), and a driver configured to drive the acoustic phonon emitter to emit acoustic phonons (hypersound).Type: ApplicationFiled: August 9, 2019Publication date: February 13, 2020Inventors: Eric Kittlaus, Nils Otterstrom, Prashanta Kharel, Shai Gertler, Peter Rakich
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Publication number: 20200030849Abstract: Techniques are provided to optomechanically couple light to a crystal structure, thereby producing stable, coherent bulk acoustic modes within the structure. In some embodiments, a resonator may comprise a plano-convex crystal structure to which pump light may be applied. The pump light may transfer energy to acoustic phonon modes of the crystal structure so as to create acoustic phonon modes with a coherence length greater than a length of the crystal structure. High frequency and high quality factor resonators may thereby be produced and operated.Type: ApplicationFiled: February 28, 2018Publication date: January 30, 2020Applicant: Yale UniversityInventors: Peter Rakich, Prashanta Kharel, William Renninger, Ryan Orson Behunin
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Publication number: 20180331490Abstract: Techniques for producing a Brillouin laser are provided. According to some aspects, techniques are based on forward Brillouin scattering and a multimode acousto-optic waveguide in which light is scattered between optical modes of the waveguide via the Brillouin scattering. This process may transfer energy from a waveguide mode of pump light to a waveguide mode of Stokes light. This process may be referred to herein as Stimulated Inter-Modal Brillouin Scattering (SIMS). Since SIMS is based on forward Brillouin scattering, laser (Stokes) light may be output in a different direction than back toward the input pump light, and as such there is no need for a circulator or other non-reciprocal device to protect the pump light as in conventional devices.Type: ApplicationFiled: May 11, 2018Publication date: November 15, 2018Applicant: Yale UniversityInventors: Peter Rakich, Nils Thomas Otterstrom, Eric Andrew Kittlaus, Ryan Orson Behunin, Zheng Barton Wang
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Patent number: 7583874Abstract: Influence of distance between two coupled strong-confinement photonic devices on optically resonant condition thereof and/or on optical forces.Type: GrantFiled: October 31, 2008Date of Patent: September 1, 2009Assignee: Massachusetts Institute of TechnologyInventors: Peter Rakich, Milos Popovic
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Publication number: 20090116788Abstract: Influence of distance between two coupled strong-confinement photonic devices on optically resonant condition thereof and/or on optical forces.Type: ApplicationFiled: October 31, 2008Publication date: May 7, 2009Applicant: Massachusetts Institute of TechnologyInventors: Peter Rakich, Milos Popvic
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Patent number: 7421171Abstract: A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical rectification. The photonic crystal structure is configured to have the suitable transverse dispersion relations and enhanced density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the photonic crystal.Type: GrantFiled: June 19, 2007Date of Patent: September 2, 2008Assignee: Massachusetts Institute of TechnologyInventors: Mihai Ibanescu, Evan Reed, Peter Rakich, Steven G. Johnson, Erich P. Ippen, John D. Joannopoulos, Marin Soljacic, Rafif E. Hamam
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Publication number: 20070297734Abstract: A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical rectification. The photonic crystal structure is configured to have the suitable transverse dispersion relations and enhanced density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the photonic crystal.Type: ApplicationFiled: June 19, 2007Publication date: December 27, 2007Inventors: Mihai Ibanescu, Evan Reed, Peter Rakich, Steven Johnson, Erich Ippen, John Joannopoulos, Marin Soljacic, Rafif Hamam