Patents by Inventor Jinjin Guo

Jinjin Guo 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).

  • High speed semiconductor laser with a beam expanding structure
    Patent number: 9966734
    Abstract: The present invention discloses a semiconductor laser comprising an optical waveguide structure which may include a lower waveguide layer, an active layer of multiple quantum wells and an upper waveguide layer, which are successively stacked from bottom to top, a grating layer being formed on upper portion of the active layer, wherein the upper waveguide layer, a cladding layer and a contact layer are formed as a ridge which has a light incidence end surface and a light output end surface, wherein a beam expanding structure is formed on one end of the output end surface. The beam expanding structure has a beam expanding portion with a shape gradually contracted inwards from the light output end surface. Preferably, the beam expanding portion has a horizontal divergence angle of 5° to 20°.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: May 8, 2018
    Assignee: Institute of Semiconductors, Chinese Academy of Sciences
    Inventors: Ninghua Zhu, Jianguo Liu, Jinjin Guo, Wei Chen
  • High Speed Semiconductor Laser with a Beam Expanding Structure
    Publication number: 20170310080
    Abstract: The present invention discloses a semiconductor laser comprising an optical waveguide structure which may include a lower waveguide layer, an active layer of multiple quantum wells and an upper waveguide layer, which are successively stacked from bottom to top, a grating layer being formed on upper portion of the active layer, wherein the upper waveguide layer, a cladding layer and a contact layer are formed as a ridge which has a light incidence end surface and a light output end surface, wherein a beam expanding structure is formed on one end of the output end surface. The beam expanding structure has a beam expanding portion with a shape gradually contracted inwards from the light output end surface. Preferably, the beam expanding portion has a horizontal divergence angle of 5° to 20°.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 26, 2017
    Inventors: Ninghua Zhu, Jianguo Liu, Jinjin Guo, Wei Chen