Patents by Inventor Amit Singh Nagra
Amit Singh Nagra 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: 20230280532Abstract: An optoelectronic device. The device comprising: an input waveguide, which receives an optical signal; a multistage photodiode detector, comprising a plurality of photodiode elements connected in series, one of the photodiode elements of the plurality of photodiode elements being connected to the input waveguide and configured to receive the optical signal therefrom; and a first electrode and a second electrode, wherein the first electrode is connected to a first contact of each of the plurality of photodiode elements, and the second electrode is connected to a second contact of each of the plurality of photodiode elements.Type: ApplicationFiled: November 16, 2022Publication date: September 7, 2023Inventors: Thomas Pierre SCHRANS, Amit Singh NAGRA, Albert BENZONI, Andrew George RICKMAN
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Publication number: 20230038906Abstract: A system and method for positioning a sensor on a subject. In some embodiments, the system includes an instrument holder, the instrument holder being configured to be secured to a subject, and to hold an instrument temporarily.Type: ApplicationFiled: August 3, 2022Publication date: February 9, 2023Inventors: Benjamin VER STEEG, Amit Singh NAGRA, Haydn Frederick JONES
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Patent number: 11520112Abstract: An optoelectronic device. The device comprising: a silicon-on-insulator, SOI, wafer, the SOI wafer including a cavity and an input waveguide, the input waveguide being optically coupled into the cavity; and a mirror, located within the cavity and bonded to a bed thereof, the mirror including a reflector configured to reflect light received from the input waveguide in the SOI wafer.Type: GrantFiled: November 6, 2020Date of Patent: December 6, 2022Assignee: Rockley Photonics LimitedInventors: Yi Zhang, Chia-Te Chou, William Vis, Amit Singh Nagra, Hooman Abediasl
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Patent number: 11513292Abstract: A mirror and method of fabricating the mirror, the method comprising: providing a silicon-on-insulator substrate, the substrate comprising: a silicon support layer; a buried oxide (BOX) layer on top of the silicon support layer; and a silicon device layer on top of the BOX layer; creating a via in the silicon device layer, the via extending to the BOX layer; etching away a portion of the BOX layer starting at the via and extending laterally away from the via in a first direction to create a channel between the silicon device layer and silicon support layer; applying an anisotropic etch via the channel to regions of the silicon device layer and silicon support layer adjacent to the channel; the anisotropic etch following an orientation plane of the silicon device layer and silicon support layer to create a cavity underneath an overhanging portion of the silicon device layer; the overhanging portion defining a planar underside surface for vertically coupling light into and out of the silicon device layer; andType: GrantFiled: May 4, 2020Date of Patent: November 29, 2022Inventors: Henri Nykänen, John Paul Drake, Evie Kho, Damiana Lerose, Sanna Leena Mäkelä, Amit Singh Nagra
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Patent number: 11150494Abstract: A Mach-Zehnder waveguide modulator. In some embodiments, the Mach-Zehnder waveguide modulator includes a first arm including a first optical waveguide, and a second arm including a second optical waveguide. The first optical waveguide includes a junction, and the Mach-Zehnder waveguide modulator further includes a plurality of electrodes for providing a bias across the junction to enable control of the phase of light travelling through the junction.Type: GrantFiled: August 23, 2019Date of Patent: October 19, 2021Assignee: Rockley Photonics LimitedInventors: Guomin Yu, Hooman Abediasl, Aaron L. Birkbeck, Jeffrey Driscoll, Haydn Frederick Jones, Damiana Lerose, Amit Singh Nagra, David Arlo Nelson, Dong Yoon Oh, Pradeep Srinivasan, Aaron John Zilkie
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Publication number: 20210311335Abstract: A modulator. In some embodiments, the modulator includes a portion of an optical waveguide, the waveguide including a rib extending upwards from a surrounding slab. The rib may have a first sidewall, and a second sidewall parallel to the first sidewall. The rib may include a first region of a first conductivity type, and a second region of a second conductivity type different from the first conductivity type. The second region may have a first portion parallel to and extending to the first sidewall, and a second portion parallel to the second sidewall. The first region may extend between the first portion of the second region and the second portion of the second region.Type: ApplicationFiled: June 18, 2021Publication date: October 7, 2021Inventors: James Dongyoon Oh, David Arlo Nelson, Pradeep Srinivasan, Amit Singh Nagra, Aaron John Zilkie, Jeffrey Driscoll, Aaron L. Birkbeck
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Patent number: 11105975Abstract: A waveguide optoelectronic device comprising a rib waveguide region, and method of manufacturing a rib waveguide region, the rib waveguide region having: a base of a first material, and a ridge extending from the base, at least a portion of the ridge being formed from a chosen semiconductor material which is different from the material of the base wherein the silicon base includes a first slab region at a first side of the ridge and a second slab region at a second side of the ridge; and wherein: a first doped region extends along: the first slab region and along a first sidewall of the ridge, the first sidewall contacting the first slab region; and a second doped region extends along: the second slab region and along a second sidewall of the ridge, the second sidewall contacting the second slab region.Type: GrantFiled: December 1, 2017Date of Patent: August 31, 2021Assignee: Rockley Photonics LimitedInventors: Hooman Abediasl, Damiana LeRose, Amit Singh Nagra, Guomin Yu
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Patent number: 11101256Abstract: An optoelectronic device. The optoelectronic device operable to provide a PAM-N modulated output, the device comprising: M optical modulators, M being an integer greater than 1, the M optical modulators being arranged in a cascade, the device being configured to operate in N distinct transmittance states, as a PAM-N modulator, wherein, in each transmittance state of the N distinct transmittance states, each of the M optical modulators has applied to it a respective control voltage equal to one of: a first voltage or a second voltage. One or more of the modulators may include a substrate; a crystalline cladding layer, on top of the substrate; and an optically active region, above the crystalline cladding layer. The crystalline cladding layer may have a refractive index which is less than a refractive index of the optically active region.Type: GrantFiled: November 19, 2018Date of Patent: August 24, 2021Assignee: Rockley Photonics LimitedInventors: Guomin Yu, Amit Singh Nagra, Damiana Lerose, Hooman Abediasl, Pradeep Srinivasan, Joyce Kai See Poon, Zheng Yong, Haydn Frederick Jones
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Patent number: 11054674Abstract: A modulator. In some embodiments, the modulator includes a portion of an optical waveguide, the waveguide including a rib extending upwards from a surrounding slab. The rib may have a first sidewall, and a second sidewall parallel to the first sidewall. The rib may include a first region of a first conductivity type, and a second region of a second conductivity type different from the first conductivity type. The second region may have a first portion parallel to and extending to the first sidewall, and a second portion parallel to the second sidewall. The first region may extend between the first portion of the second region and the second portion of the second region.Type: GrantFiled: April 24, 2019Date of Patent: July 6, 2021Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, David Arlo Nelson, Pradeep Srinivasan, Amit Singh Nagra, Aaron John Zilkie, Jeffrey Driscoll, Aaron L. Birkbeck
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Patent number: 11036006Abstract: A waveguide device and method of doping a waveguide device, the waveguide device comprising a rib waveguide region, the rib waveguide region having: a base, and a ridge extending from the base, wherein: the base includes a first slab region at a first side of the ridge and a second slab region at a second side of the ridge; a first doped slab region extends along the first slab region; a second doped slab region extends along the second slab region; a first doped sidewall region extends along a first sidewall of the ridge and along a portion of the first slab, the first doped sidewall region being in contact with the first doped slab region at a first slab interface; and a second doped sidewall region extends along a second sidewall of the ridge and along a portion of the second slab, the second doped sidewall region being in contact with the second doped slab region at a second slab interface; and wherein the separation between the first sidewall of the ridge and the first slab interface is no more than 10 ?Type: GrantFiled: December 1, 2017Date of Patent: June 15, 2021Assignee: Rockley Photonics LimitedInventors: Damiana Lerose, Hooman Abediasl, Amit Singh Nagra
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Publication number: 20210141172Abstract: An optoelectronic device. The device comprising: a silicon-on-insulator, SOI, wafer, the SOI wafer including a cavity and an input waveguide, the input waveguide being optically coupled into the cavity; and a mirror, located within the cavity and bonded to a bed thereof, the mirror including a reflector configured to reflect light received from the input waveguide in the SOI wafer.Type: ApplicationFiled: November 6, 2020Publication date: May 13, 2021Inventors: Yi Zhang, Chia-Te Chou, William Vis, Amit Singh Nagra, Hooman Abediasl
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Patent number: 10962718Abstract: A reconfigurable spectroscopy system comprises tunable lasers and wavelength lockers to lock to accurate reference wavelengths. Band combiners with differently optimized wavelength ranges multiplex the optical signal over the time domain, to emit a plurality of reference wavelengths for spectroscopy applications. The power requirements are greatly reduced by multiplexing over the time domain in time slots which do not affect sampling and receiving of the spectroscopy data.Type: GrantFiled: May 5, 2020Date of Patent: March 30, 2021Assignee: ROCKLEY PHOTONICS LIMITEDInventors: Hooman Abediasl, Amit Singh Nagra, Andrew George Rickman, Thomas Pierre Schrans, Pradeep Srinivasan, Andrea Trita, Aaron John Zilkie
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Patent number: 10928659Abstract: An optoelectronic device and method of making the same. The device comprising: a substrate; an epitaxial crystalline cladding layer, on top of the substrate; and an optically active region, above the epitaxial crystalline cladding layer; wherein the epitaxial crystalline cladding layer has a refractive index which is less than a refractive index of the optically active region, such that the optical power of the optoelectronic device is confined to the optically active region.Type: GrantFiled: February 13, 2019Date of Patent: February 23, 2021Assignee: Rockley Photonics LimitedInventors: Andrew Rickman, Aaron Zilkie, Guomin Yu, Hooman Abediasl, Damiana Lerose, Amit Singh Nagra, Pradeep Srinivasan, Haydn Jones
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Patent number: 10921616Abstract: An optoelectronic device and method of making the same. The device comprising: a substrate; an epitaxial crystalline cladding layer, on top of the substrate; and an optically active region, above the epitaxial crystalline cladding layer; wherein the epitaxial crystalline cladding layer has a refractive index which is less than a refractive index of the optically active region, such that the optical power of the optoelectronic device is confined to the optically active region.Type: GrantFiled: May 22, 2019Date of Patent: February 16, 2021Assignee: Rockley Photonics LimitedInventors: Guomin Yu, Hooman Abediasl, Damiana Lerose, Amit Singh Nagra, Pradeep Srinivasan, Haydn Jones
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Patent number: 10816830Abstract: An optoelectronic device and method of making the same. The device comprising: a substrate; an epitaxial crystalline cladding layer, on top of the substrate; and an optically active region, above the epitaxial crystalline cladding layer; wherein the epitaxial crystalline cladding layer has a refractive index which is less than a refractive index of the optically active region, such that the optical power of the optoelectronic device is confined to the optically active region.Type: GrantFiled: February 13, 2019Date of Patent: October 27, 2020Assignee: ROCKLEY PHOTONICS LIMITEDInventors: Andrew Rickman, Aaron Zilkie, Guomin Yu, Hooman Abediasl, Damiana Lerose, Amit Singh Nagra, Pradeep Srinivasan, Haydn Jones
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Publication number: 20200264372Abstract: A mirror and method of fabricating the mirror, the method comprising: providing a silicon-on-insulator substrate, the substrate comprising: a silicon support layer; a buried oxide (BOX) layer on top of the silicon support layer; and a silicon device layer on top of the BOX layer; creating a via in the silicon device layer, the via extending to the BOX layer; etching away a portion of the BOX layer starting at the via and extending laterally away from the via in a first direction to create a channel between the silicon device layer and silicon support layer; applying an anisotropic etch via the channel to regions of the silicon device layer and silicon support layer adjacent to the channel; the anisotropic etch following an orientation plane of the silicon device layer and silicon support layer to create a cavity underneath an overhanging portion of the silicon device layer; the overhanging portion defining a planar underside surface for vertically coupling light into and out of the silicon device layer; and aType: ApplicationFiled: May 4, 2020Publication date: August 20, 2020Inventors: Henri Nykänen, John Paul Drake, Evie Kho, Damiana Lerose, Sanna Leena Mäkelä, Amit Singh Nagra
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Publication number: 20200264377Abstract: A reconfigurable spectroscopy system comprises tunable lasers and wavelength lockers to lock to accurate reference wavelengths. Band combiners with differently optimized wavelength ranges multiplex the optical signal over the time domain, to emit a plurality of reference wavelengths for spectroscopy applications. The power requirements are greatly reduced by multiplexing over the time domain in time slots which do not affect sampling and receiving of the spectroscopy data.Type: ApplicationFiled: May 5, 2020Publication date: August 20, 2020Inventors: Hooman ABEDIASL, Amit Singh NAGRA, Andrew George RICKMAN, Thomas Pierre SCHRANS, Pradeep SRINIVASAN, Andrea TRITA, Aaron John ZILKIE
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Patent number: 10677989Abstract: A reconfigurable spectroscopy system comprises tunable lasers and wavelength lockers to lock to accurate reference wavelengths. Band combiners with differently optimized wavelength ranges multiplex the optical signal over the time domain, to emit a plurality of reference wavelengths for spectroscopy applications. The power requirements are greatly reduced by multiplexing over the time domain in time slots which do not affect sampling and receiving of the spectroscopy data.Type: GrantFiled: July 3, 2018Date of Patent: June 9, 2020Assignee: ROCKLEY PHOTONICS LIMITEDInventors: Hooman Abediasl, Andrew George Rickman, Amit Singh Nagra, Andrea Trita, Thomas Pierre Schrans, Aaron John Zilkie, Pradeep Srinivasan
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Patent number: 10641962Abstract: A mirror and method of fabricating the mirror, the method comprising: providing a silicon-on-insulator substrate, the substrate comprising: a silicon support layer; a buried oxide (BOX) layer on top of the silicon support layer; and a silicon device layer on top of the BOX layer; creating a via in the silicon device layer, the via extending to the BOX layer; etching away a portion of the BOX layer starting at the via and extending laterally away from the via in a first direction to create a channel between the silicon device layer and silicon support layer; applying an anisotropic etch via the channel to regions of the silicon device layer and silicon support layer adjacent to the channel; the anisotropic etch following an orientation plane of the silicon device layer and silicon support layer to create a cavity underneath an overhanging portion of the silicon device layer; the overhanging portion defining a planar underside surface for vertically coupling light into and out of the silicon device layer; and aType: GrantFiled: March 28, 2019Date of Patent: May 5, 2020Assignee: Rockley Photonics LimitedInventors: Henri Nykänen, John Paul Drake, Evie Kho, Damiana Lerose, Sanna Leena Mäkelä, Amit Singh Nagra
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Publication number: 20200133091Abstract: A modulator. In some embodiments, the modulator includes a portion of an optical waveguide, the waveguide including a rib extending upwards from a surrounding slab. The rib may have a first sidewall, and a second sidewall parallel to the first sidewall. The rib may include a first region of a first conductivity type, and a second region of a second conductivity type different from the first conductivity type. The second region may have a first portion parallel to and extending to the first sidewall, and a second portion parallel to the second sidewall. The first region may extend between the first portion of the second region and the second portion of the second region.Type: ApplicationFiled: April 24, 2019Publication date: April 30, 2020Inventors: DongYoon Oh, David Arlo Nelson, Pradeep Srinivasan, Amit Singh Nagra, Aaron John Zilkie, Jeffrey Driscoll, Aaron L. Birkbeck