Patents by Inventor Pierre Asselin
Pierre Asselin 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: 20230393274Abstract: A device includes a controller with a processor and memory with instructions for controlling power to a light source such that the light source emits a frequency-modulated continuous light beam that, over time, includes an up region, a down region, and a flat region. The up region includes increasing a frequency of the continuous light beam, the down region includes decreasing the frequency of the continuous light beam, and the flat region includes maintaining the frequency of the continuous light beam at a constant frequency.Type: ApplicationFiled: August 21, 2023Publication date: December 7, 2023Inventors: Daniel J. Klemme, Pierre Asselin, Zoran Jandric
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Patent number: 11754711Abstract: A device includes a controller with a processor and memory with instructions for controlling power to a light source such that the light source emits a frequency-modulated continuous light beam that, over time, includes an up region, a down region, and a flat region. The up region includes increasing a frequency of the continuous light beam, the down region includes decreasing the frequency of the continuous light beam, and the flat region includes maintaining the frequency of the continuous light beam at a constant frequency.Type: GrantFiled: March 5, 2020Date of Patent: September 12, 2023Assignee: LUMINAR TECHNOLOGIES, INC.Inventors: Daniel J. Klemme, Pierre Asselin, Zoran Jandric
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Patent number: 11709237Abstract: The technology disclosed herein includes a system having a light source configured to generate a laser signal, an optical signal splitter circuit configured to split the laser signal into a first laser signal for transmission to a plurality of targets and a second laser signal, an optical signal scanner configured to transmit the first laser signal to the plurality of targets, two or more optical delay lines configured to receive the second laser signal, wherein each of the two or more optical delay lines adds a predetermined time delay to the second laser signal to generate a delayed second laser signal, and a detector configured to receive a reflected laser signal from the plurality of targets, wherein the reflected laser signal includes a reflection of the first laser signal from the plurality of targets, and the delayed second laser signal.Type: GrantFiled: June 30, 2020Date of Patent: July 25, 2023Assignee: LUMINAR TECHNOLOGIES, INC.Inventors: Daniel Joseph Klemme, Pierre Asselin
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Patent number: 11443765Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.Type: GrantFiled: April 5, 2021Date of Patent: September 13, 2022Assignee: Seagate Technology LLCInventors: Reyad Mehfuz, Aidan Dominic Goggin, Pierre Asselin, Christopher Neil Harvey
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Publication number: 20220276354Abstract: An apparatus includes a detector, a light source configured to emit light, a reflecting apparatus having multiple reflective facets, and a mirror. The reflecting apparatus is configured to rotate around an axis and arranged to reflect the emitted light from the light source and reflect backscattered light. The mirror is arranged to reflect the backscattered light from the reflecting apparatus towards the detector.Type: ApplicationFiled: May 18, 2022Publication date: September 1, 2022Inventors: Kevin A. Gomez, Zoran Jandric, Krishnan Subramanian, Pierre Asselin, Dan Mohr, Raghu Ambekar Ramachan Rao
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Patent number: 11391822Abstract: An apparatus includes a detector, a light source configured to emit light, a reflecting apparatus having multiple reflective facets, and a mirror. The reflecting apparatus is configured to rotate around an axis and arranged to reflect the emitted light from the light source and reflect backscattered light. The mirror is arranged to reflect the backscattered light from the reflecting apparatus towards the detector.Type: GrantFiled: November 30, 2018Date of Patent: July 19, 2022Assignee: Seagate Technology LLCInventors: Kevin A Gomez, Zoran Jandric, Krishnan Subramanian, Pierre Asselin, Dan Mohr, Raghu Ambekar Ramachandra Rao
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Publication number: 20210405164Abstract: The technology disclosed herein includes a system having a light source configured to generate a laser signal, an optical signal splitter circuit configured to split the laser signal into a first laser signal for transmission to a plurality of targets and a second laser signal, an optical signal scanner configured to transmit the first laser signal to the plurality of targets, two or more optical delay lines configured to receive the second laser signal, wherein each of the two or more optical delay lines adds a predetermined time delay to the second laser signal to generate a delayed second laser signal, and a detector configured to receive a reflected laser signal from the plurality of targets, wherein the reflected laser signal includes a reflection of the first laser signal from the plurality of targets, and the delayed second laser signal.Type: ApplicationFiled: June 30, 2020Publication date: December 30, 2021Inventors: Daniel Joseph KLEMME, Pierre ASSELIN
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Publication number: 20210225397Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.Type: ApplicationFiled: April 5, 2021Publication date: July 22, 2021Inventors: Reyad Mehfuz, Aidan Dominic Goggin, Pierre Asselin, Christopher Neil Harvey
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Publication number: 20210199803Abstract: A device includes a controller with a processor and memory with instructions for controlling power to a light source such that the light source emits a frequency-modulated continuous light beam that, over time, includes an up region, a down region, and a flat region. The up region includes increasing a frequency of the continuous light beam, the down region includes decreasing the frequency of the continuous light beam, and the flat region includes maintaining the frequency of the continuous light beam at a constant frequency.Type: ApplicationFiled: March 5, 2020Publication date: July 1, 2021Inventors: Daniel J. Klemme, Pierre Asselin, Zoran Jandric
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Patent number: 10971179Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.Type: GrantFiled: June 6, 2019Date of Patent: April 6, 2021Assignee: Seagate Technology LLCInventors: Reyad Mehfuz, Aidan Dominic Goggin, Pierre Asselin, Christopher Neil Harvey
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Publication number: 20200174103Abstract: An apparatus includes a detector, a light source configured to emit light, a reflecting apparatus having multiple reflective facets, and a mirror. The reflecting apparatus is configured to rotate around an axis and arranged to reflect the emitted light from the light source and reflect backscattered light. The mirror is arranged to reflect the backscattered light from the reflecting apparatus towards the detector.Type: ApplicationFiled: November 30, 2018Publication date: June 4, 2020Inventors: Kevin A. Gomez, Zoran Jandric, Krishnan Subramanian, Pierre Asselin, Dan Mohr, Raghu Ambekar Ramachandra Rao
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Publication number: 20200174102Abstract: An apparatus includes a detector, a light source configured to emit light, a plurality of disks, and a focusing apparatus. Each disk includes a set of prisms, and each disk is independently rotatable, arranged to receive the emitted light directly or indirectly from the light source, and arranged to receive backscattered light from an object. The focusing apparatus is arranged to focus the backscattered light from the plurality of disks towards the detector.Type: ApplicationFiled: November 30, 2018Publication date: June 4, 2020Inventors: Pierre Asselin, Martin Giles Blaber, Zoran Jandric, Dan Mohr, Kevin A. Gomez
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Patent number: 9987509Abstract: The invention is directed to a pressure controller and a method for monitoring and controlling the pressure level in a fire protection piping network maintained under vacuum pressure and for detecting a positive pressure variation in the network. The rate of pressure increase is used to detect the opening of a sprinkler head in the sprinkler piping network.Type: GrantFiled: July 21, 2017Date of Patent: June 5, 2018Assignee: Systèmes Fireflex Inc.Inventors: Jean-Pierre Asselin, Sylvain Coupal, Frédéric Lachance, Jonathan Roger
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Patent number: 9946016Abstract: An apparatus includes a waveguide extending along a light-propagation direction between a light source and a media-facing surface. The waveguide comprises an assistant layer configured to receive light from a light source, truncated with an intermediate bottom cladding layer. A core layer comprises a coupling end configured to receive light from the assistant layer. The coupling end comprises a taper that widens toward the media-facing surface. A near field transducer is disposed proximate the media-facing surface and is configured to receive the light from the core layer.Type: GrantFiled: September 23, 2015Date of Patent: April 17, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Chubing Peng, Pierre Asselin, Lien Lee, Karen V. Rud
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Patent number: 9633683Abstract: An apparatus includes a write head comprising a near-field transducer at a media-facing surface of the write head and a waveguide extending along a light-propagation direction. The waveguide is configured to receive light emitted from a light source at a fundamental transverse electric mode. The waveguide is configured to deliver the light to the near-field transducer at a transverse magnetic mode which directs surface plasmons to a recording medium in response thereto. The waveguide comprises a core with first and second tapers separated by a straight portion of constant cross sectional width. The first and second tapers successively decrease a cross-sectional width of the core as it nears the near-field transducer. The waveguide includes an end portion between the second taper and the near field transducer. The end portion comprises a top cladding layer, aside cladding layer, and a bottom cladding layer on the side cladding layer.Type: GrantFiled: February 19, 2015Date of Patent: April 25, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Tae-Woo Lee, Yi-Kuei Ryan Wu, Pierre Asselin, Werner Scholz
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Publication number: 20170084299Abstract: An apparatus includes a waveguide extending along a light-propagation direction between a light source and a media-facing surface. The waveguide comprises an assistant layer configured to receive light from a light source, truncated with an intermediate bottom cladding layer. A core layer comprises a coupling end configured to receive light from the assistant layer. The coupling end comprises a taper that widens toward the media-facing surface. A near field transducer is disposed proximate the media-facing surface and is configured to receive the light from the core layer.Type: ApplicationFiled: September 23, 2015Publication date: March 23, 2017Inventors: Chubing Peng, Pierre Asselin, Lien Lee, Karen V. Rud
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Patent number: 9558764Abstract: A write head includes a near-field transducer near a media-facing surface of the write head. The write head includes a waveguide having a core with a first side disposed proximate to the near-field transducer. The core overlaps the near-field transducer at a substrate-parallel plane. The core includes one of a step or a taper on a second side facing away from the first side. The step or the taper causes a reduced thickness of the core normal to the substrate-parallel plane. The write head includes a cladding layer that encompassing the second side of the core and that fills in the step or the taper.Type: GrantFiled: October 19, 2015Date of Patent: January 31, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Ruoxi Yang, Pierre Asselin, Yongjun Zhao, James Gary Wessel, Tae-Woo Lee, Werner Scholz, Frank Edgar Stageberg
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Patent number: 9449627Abstract: An apparatus has an input surface configured to receive energy emitted from an energy source in a first mode. A mode order converter is configured to convert the energy from the first mode to a second mode. The waveguide of the apparatus has an input end disposed proximate the input surface and configured to receive the energy in the first mode. The waveguide has an output end disposed proximate a media-facing surface and configured to deliver energy in the second mode. The output end is at an oblique angle to a cross-track line at an intersection of the media-facing surface and a substrate-parallel plane.Type: GrantFiled: December 1, 2015Date of Patent: September 20, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Lina Cao, Chubing Peng, Werner Scholz, Pierre Asselin, Tae-Woo Lee
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Publication number: 20160247525Abstract: An apparatus includes a write head comprising a near-field transducer at a media-facing surface of the write head and a waveguide extending along a light-propagation direction. The waveguide is configured to receive light emitted from a light source at a fundamental transverse electric mode. The waveguide is configured to deliver the light to the near-field transducer at a transverse magnetic mode which directs surface plasmons to a recording medium in response thereto. The waveguide comprises a core with first and second tapers separated by a straight portion of constant cross sectional width. The first and second tapers successively decrease a cross-sectional width of the core as it nears the near-field transducer. The waveguide includes an end portion between the second taper and the near field transducer. The end portion comprises a top cladding layer, aside cladding layer, and a bottom cladding layer on the side cladding layer.Type: ApplicationFiled: February 19, 2015Publication date: August 25, 2016Inventors: Tae-Woo Lee, Yi-Kuei Ryan Wu, Pierre Asselin, Werner Scholz
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Publication number: 20160210991Abstract: Systems that include an energy source configured to provide transverse electric (TE) mode energy; a channel waveguide configured to receive energy from the energy source, the channel waveguide having at least one mirror plane; and a near field transducer (NFT) configured to receive energy from the channel waveguide, the NFT having at least one mirror plane.Type: ApplicationFiled: December 17, 2015Publication date: July 21, 2016Inventors: Amit Vasant Itagi, Pierre Asselin, Frank Edgar Stageberg, Werner Scholz