Patents by Inventor Mian Zhang

Mian Zhang 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).

  • Patent number: 12282214
    Abstract: An electro-optic device is described. The electro-optic device includes a substrate, an insulator on the substrate, an optical structure on the insulator and an electrode proximate to at least a portion of the optical structure. The substrate includes a trench region having a plurality of trenches therein. The trench region has an effective microwave index based on a substrate material and the plurality of trenches. The insulator is on the substrate. The optical structure is on the insulator. The optical structure has a thin film electro-optic layer including lithium. The electrode is proximate to a portion of the optical structure.
    Type: Grant
    Filed: June 16, 2023
    Date of Patent: April 22, 2025
    Assignee: HyperLight Corporation
    Inventors: Christian Reimer, Mian Zhang
  • Patent number: 12273309
    Abstract: Aspects of the present disclosure involve a system comprising a computer-readable storage medium storing a program and method for providing permissions for accessing shared content collections. The program and method provide for receiving, from a first device associated with a first user, an indication of first user input to share a content collection between the first user and a second user selected by the first user, the content collection comprising at least one media content item, the second user corresponding to a contact of the first user within a messaging application; storing the content collection in association with the first user and the second user; providing the first user with a first set of permissions for accessing the content collection; and providing the second user with a second set of permissions for accessing the content collection, the second set of permissions being more restrictive than the first set of permissions.
    Type: Grant
    Filed: December 30, 2022
    Date of Patent: April 8, 2025
    Assignee: Snap Inc.
    Inventors: Nathan Kenneth Boyd, Siqi Chen, Matthew Lee Cook, Andrew Grosvenor Cooper, Benedict Copping, Edward Koai, Tao Marvin Liu, Yiwen Zhan, Mian Zhang
  • Patent number: 12265253
    Abstract: Low loss fiber-to-chip interfaces for lithium niobate photonic integrated circuits are provided. An optical circuit includes a waveguide comprising an electro-optical material. The waveguide includes an elevated ridge and a slab underlying the elevated ridge, the elevated ridge and the slab extending along a central axis toward an optical interface. The elevated ridge and the slab each have a plurality of cross-sections along the central axis, each cross-section having a width measured perpendicular to the central axis, wherein the width of elevated ridge is smaller than the width of the slab for every cross-section along the central axis. The elevated ridge includes a tapered portion having a first taper, wherein the cross-section of the elevated portion decreases along the central axis toward the optical interface. The slab includes a tapered portion having a second taper, wherein the cross-section of the slab decreases along the central axis toward the optical interface.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: April 1, 2025
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Lingyan He, Mian Zhang, Amirhassan Shams-Ansari, Marko Loncar
  • Publication number: 20250093689
    Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.
    Type: Application
    Filed: November 25, 2024
    Publication date: March 20, 2025
    Inventors: Mian Zhang, Christian Reimer, Prashanta Kharel
  • Patent number: 12253786
    Abstract: An integrated electro-optic frequency comb generator based on ultralow loss integrated, e.g. thin-film lithium niobate, platform, which enables low power consumption comb generation spanning over a wider range of optical frequencies. The comb generator includes an intensity modulator, and at least one phase modulator, which provides a powerful technique to generate a broad high power comb, without using an optical resonator. A compact integrated electro-optic modulator based frequency comb generator, provides the benefits of integrated, e.g. lithium niobate, platform including low waveguide loss, high electro-optic modulation efficiency, small bending radius and flexible microwave design.
    Type: Grant
    Filed: June 23, 2023
    Date of Patent: March 18, 2025
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Christian Reimer, Kevin Luke
  • Publication number: 20250060530
    Abstract: A hybrid photonics device package is described. The hybrid photonics device package includes an electro-optic integrated circuit and a photonics integrated circuit. The electro-optic integrated circuit includes an optical structure and an electrode on a first substrate. The optical structure has a thin film electro-optic layer including lithium. The photonics integrated circuit includes a second substrate and a photonics component on the second substrate. The photonics component and the optical structure are optically coupled. One of the electro-optic integrated circuit and the photonics integrated circuit is mounted on an other of the electro-optic integrated circuit and the photonics integrated circuit.
    Type: Application
    Filed: November 1, 2024
    Publication date: February 20, 2025
    Inventors: Mian Zhang, Roy Meade, Christian Reimer
  • Publication number: 20250013086
    Abstract: An optical device is described. The optical device includes a waveguide and a modulation driver. The waveguide includes a first region, a second region, and a tapered region between the first and second regions. The first region supports a first set of modes of an optical signal. The second region supports a second set of modes of the optical signal. The first set of modes is different from the second set of modes. The tapered region is between the first region and the second region. The waveguide includes lithium. The modulation driver is configured to provide modulation of the optical signal in the first region.
    Type: Application
    Filed: July 18, 2024
    Publication date: January 9, 2025
    Inventors: Christian Reimer, Jeffrey Cole Holzgrafe, Mian Zhang, Kevin Luke
  • Patent number: 12189217
    Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.
    Type: Grant
    Filed: February 9, 2024
    Date of Patent: January 7, 2025
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Christian Reimer, Prashanta Kharel
  • Patent number: 12174419
    Abstract: A hybrid photonics device package is described. The hybrid photonics device package includes an electro-optic integrated circuit and a photonics integrated circuit. The electro-optic integrated circuit includes an optical structure and an electrode on a first substrate. The optical structure has a thin film electro-optic layer including lithium. The photonics integrated circuit includes a second substrate and a photonics component on the second substrate. The photonics component and the optical structure are optically coupled. One of the electro-optic integrated circuit and the photonics integrated circuit is mounted on an other of the electro-optic integrated circuit and the photonics integrated circuit.
    Type: Grant
    Filed: June 12, 2023
    Date of Patent: December 24, 2024
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Roy Meade, Christian Reimer
  • Publication number: 20240385470
    Abstract: A wafer for an integrated photonics system is described. The wafer includes a substrate and at least one thin film lithium-containing optical material on the substrate. The wafer also includes at least one photodetecting layer on and bonded with the thin film lithium-containing optical material(s).
    Type: Application
    Filed: May 15, 2024
    Publication date: November 21, 2024
    Inventors: Mian Zhang, Roy Meade, Kevin Luke
  • Publication number: 20240369860
    Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.
    Type: Application
    Filed: February 9, 2024
    Publication date: November 7, 2024
    Inventors: Mian Zhang, Christian Reimer, Prashanta Kharel
  • Publication number: 20240280846
    Abstract: A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
    Type: Application
    Filed: May 1, 2024
    Publication date: August 22, 2024
    Inventors: Prashanta Kharel, Mian Zhang, Christian Reimer
  • Patent number: 12032211
    Abstract: An optical device configured to be coupled with an optical fiber is described. The optical device includes a waveguide, a low-confinement waveguide, and a low-confinement layer. The waveguide includes a high-confinement waveguide, which has a first index of refraction. The low-confinement waveguide is optically coupled with the high-confinement waveguide. At least a portion of the low-confinement waveguide has a second index of refraction less than the first index of refraction. The low-confinement waveguide has a thickness of at least a mode diameter in a portion of the optical fiber. The low-confinement layer is adjacent to a portion of the low-confinement waveguide. The low-confinement layer has a third index of refraction less than the second index of refraction.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: July 9, 2024
    Assignee: HyperLight Corporation
    Inventors: Christian Reimer, Mian Zhang, Kevin Luke, Prashanta Kharel
  • Patent number: 12013601
    Abstract: A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: June 18, 2024
    Assignee: HyperLight Corporation
    Inventors: Prashanta Kharel, Mian Zhang, Christian Reimer
  • Publication number: 20240184149
    Abstract: An optical modulator includes optical material(s) and first and second differential electrode pairs. The optical material(s) exhibit an electro-optic effect and include lithium. The optical material(s) include first and second waveguides and first and second slab portions adjoining the first and second waveguides. The first differential electrode pair has electrodes arranged on opposing sides of the first waveguide. The second differential electrode pair has electrodes arranged on opposing sides of the second waveguide. The negative electrodes are arranged on distal sides of the waveguide relative to the other waveguide. The positive electrodes are arranged on proximal sides of waveguide relative to the other waveguide. The first and second waveguides, the first and second slab portions, and the first and second differential electrode pairs reside on a substrate structure. No portion of the first slab portion is between the first or second differential electrode pair and the substrate structure.
    Type: Application
    Filed: December 7, 2023
    Publication date: June 6, 2024
    Inventors: Jeffrey Cole Holzgrafe, Christian Reimer, Mian Zhang, Prashanta Kharel, Kevin Luke, Lingyan He
  • Patent number: 12001120
    Abstract: An optical device including a plurality of electrodes, an electro-optic component, an optical grating, and a buried back reflector is described. The electro-optic component includes at least one optical material exhibiting an electro-optic effect. The optical grating is optically coupled with the electro-optic component. In some embodiments, the optical grating includes a vertical optical grating coupler. The buried back reflector is optically coupled with the optical grating. The buried back reflector is configured to increase a coupling efficiency of the optical grating to an out-of-plane optical mode and configured to reduce a performance perturbation to the plurality of electrodes. The buried back reflector may include a metal layer having a thickness of at least thirty nanometers and not more than five hundred nanometers.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: June 4, 2024
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Kevin Luke, Prashanta Kharel, Christian Reimer, Lingyan He
  • Publication number: 20240142808
    Abstract: An optical device is described. At least a portion of the optical device includes ferroelectric non-linear optical material(s) and is fabricated utilizing ultraviolet lithography. In some aspects the at least the portion of the optical device is fabricated using deep ultraviolet lithography. In some aspects, the short range root mean square surface roughness of a sidewall of the at least the portion of the optical device is less than ten nanometers. In some aspects, the at least the portion of the optical device has a loss of not more than 2 dB/cm.
    Type: Application
    Filed: January 4, 2024
    Publication date: May 2, 2024
    Inventors: Mian Zhang, Kevin Luke
  • Patent number: 11940677
    Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: March 26, 2024
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Christian Reimer, Prashanta Kharel
  • Patent number: 11899293
    Abstract: An optical device is described. At least a portion of the optical device includes ferroelectric non-linear optical material(s) and is fabricated utilizing ultraviolet lithography. In some aspects the at least the portion of the optical device is fabricated using deep ultraviolet lithography. In some aspects, the short range root mean square surface roughness of a sidewall of the at least the portion of the optical device is less than ten nanometers. In some aspects, the at least the portion of the optical device has a loss of not more than 2 dB/cm.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: February 13, 2024
    Assignee: HyperLight Corporation
    Inventors: Mian Zhang, Kevin Luke
  • Publication number: 20240012308
    Abstract: An integrated electro-optic frequency comb generator based on ultralow loss integrated, e.g. thin-film lithium niobate, platform, which enables low power consumption comb generation spanning over a wider range of optical frequencies. The comb generator includes an intensity modulator, and at least one phase modulator, which provides a powerful technique to generate a broad high power comb, without using an optical resonator. A compact integrated electro-optic modulator based frequency comb generator, provides the benefits of integrated, e.g. lithium niobate, platform including low waveguide loss, high electro-optic modulation efficiency, small bending radius and flexible microwave design.
    Type: Application
    Filed: June 23, 2023
    Publication date: January 11, 2024
    Inventors: Mian Zhang, Christian Reimer, Kevin Luke