Patents by Inventor Yatao Yang

Yatao Yang 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).

  • Publication number: 20200048452
    Abstract: The invention is a polyoxymethylene film and a preparation method. The polyoxymethylene film comprises: 96 to 98 parts by weight of polyoxymethylene resin, 0.5 to 2 parts by weight of nucleating agent, 0.5 to 1 parts by weight of antioxidant, and 0.5 to 1 parts by weight of formaldehyde absorbent. In view of the high crystallinity and fast crystallization rate of polyoxymethylene, blown film process is used to directly blowing the molten mass extruded through a die of a screw extruder to form a blown film bubble. It is easy to form thin neck and easy to break when stretching, so the method is beneficial to form polyoxymethylene film, and has high processing efficiency, and is suitable for industrialization. Copolymerization unit —CH2—CH2—O— is introduced into the molecular chain of polyoxymethylene and its ratio is increased, thereby effectively reducing the crystallization rate of the materials and making it easier to form a film.
    Type: Application
    Filed: September 8, 2019
    Publication date: February 13, 2020
    Inventors: Yatao WANG, Xiaofeng MA, Jianhua LI, Lili LIU, Xuehua GUO, Hongjuan LI, Wang JIN, Dazhi YANG, Lizheng GUAN
  • Patent number: 8664584
    Abstract: A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibers, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 4, 2014
    Assignee: JDS Uniphase Corporation
    Inventors: Yatao Yang, Chang Xiao, Yujian Bao, Fenhong Zhou
  • Publication number: 20110089314
    Abstract: A compact PD unidirectivity solution for an optical tap monitor, which reduces the overall size of optical tap module, is provided. The solution is to use lensing to separate the light from the input and output fibres, and then add a mask or spacer in front of the monitor PD to prevent any of the light from the output fiber from entering the photodetector package.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 21, 2011
    Applicants: JDS Uniphase Corporation
    Inventors: Yatao YANG, Chang Xiao, Yujian Bao, Fenhong Zhou
  • Publication number: 20090103867
    Abstract: A compact variable optical attenuator having optical-tap functionality is described comprising a planar waveguide attenuator, a lens, and a photodetector. Input and output waveguides are located close to the optical axis of the lens, which reduces optical aberrations and insertion loss. The waveguide attenuator works by light absorption with virtually no scattered light present, which improves fidelity of measurements of the tapped optical power by the photodetector. The entire tap-attenuator assembly is packaged into a small form pluggable (SFP) package having two optical connectors.
    Type: Application
    Filed: October 6, 2008
    Publication date: April 23, 2009
    Applicant: JDS Uniphase Corporation
    Inventors: Qing Huang, Chang Xiao, Xiaolin Chen, Yatao Yang
  • Patent number: 7477827
    Abstract: A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: January 13, 2009
    Assignee: JDS Uniphase Corporation
    Inventors: Miaoqing Wang, Yatao Yang, Ting Xue, Yunhui Sun
  • Patent number: 7433557
    Abstract: The tunable add/drop multiplexer including a tiltable mirror, a fixed thin film filter, and first and second retro-reflector elements for redirecting express channels back out an input/output port and for redirecting drop channels back out an add/drop port, respectively.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: October 7, 2008
    Assignee: JDS Uniphase Corporation
    Inventors: Bo Chen, Bo Cai, Yatao Yang, Ming Liang, Xiaobiao Wang
  • Publication number: 20080205845
    Abstract: A variable optical attenuator is disclosed, which attenuates a beam of light while preserving its polarization substantially independent of wavelength. The beam of light is attenuated by a filter patterned with a grating of blocking stripes with serrated edges, which partially block and partially transmit the beam of light, respectively. The serrated edges provide for low polarization dependent loss. Along a length of the filter, a mark to space ratio of blocking stripe and aperture widths increases. By a linear translation of the filter along its length attenuation can be varied to a desired value. A stepper motor with lead screw can provide a suitable linear translation to give the filter a latching property.
    Type: Application
    Filed: January 30, 2008
    Publication date: August 28, 2008
    Applicant: JDS Uniphase Corporation
    Inventors: Miaoqing Wang, Yatao Yang, Ting Xue, Yunhui Sun
  • Publication number: 20080106814
    Abstract: The tunable add/drop multiplexer including a tiltable mirror, a fixed thin film filter, and first and second retro-reflector elements for redirecting express channels back out an input/output port and for redirecting drop channels back out an add/drop port, respectively.
    Type: Application
    Filed: January 11, 2008
    Publication date: May 8, 2008
    Inventors: Bo Chen, Bo Cai, Yatao Yang, Ming Liang, Xiaobiao Wang
  • Patent number: 7352928
    Abstract: The tunable add/drop multiplexer including a tiltable mirror, a fixed thin film filter, and first and second retro-reflector elements for redirecting express channels back out an input/output port and for redirecting drop channels back out an add/drop port, respectively.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 1, 2008
    Assignee: JDS Uniphase Corporation
    Inventors: Bo Chen, Bo Cai, Yatao Yang, Ming Liang, Xiaobiao Wang
  • Patent number: 7295748
    Abstract: The invention relates to compensating for the wavelength dependent loss (WDL) in a variable optical attenuator (VOA) system by using a chromatic dispersion wedge, which is inserted between the mirror and the lens. Different wavelength components, e.g. shorter blue and longer red wavelengths, are redirected at different angles by the chromatic dispersion wedge and now arrive at the output fiber at different positions. Thus the smaller mode field diameter (MFD) or mode spot size of the blue light, overlaps more of the core of the output fiber by being closer thereto and now has less insertion loss (IL) as compared to a VOA without WDL compensator.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: November 13, 2007
    Assignee: JDS Uniphase Corporation
    Inventors: Bo Chen, Xishe Liu, Yatao Yang, Bo Cai
  • Publication number: 20070230867
    Abstract: The tunable add/drop multiplexer including a tiltable mirror, a fixed thin film filter, and first and second retro-reflector elements for redirecting express channels back out an input/output port and for redirecting drop channels back out an add/drop port, respectively.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: JDS Uniphase Corporation
    Inventors: Bo Chen, Bo Cai, Yatao Yang, Ming Liang, Xiaobiao Wang
  • Publication number: 20070031104
    Abstract: The invention relates to compensating for the wavelength dependent loss (WDL) in a variable optical attenuator (VOA) system by using a chromatic dispersion wedge, which is inserted between the mirror and the lens. Different wavelength components, e.g. shorter blue and longer red wavelengths, are redirected at different angles by the chromatic dispersion wedge and now arrive at the output fiber at different positions. Thus the smaller mode field diameter (MFD) or mode spot size of the blue light, overlaps more of the core of the output fiber by being closer thereto and now has less insertion loss (IL) as compared to a VOA without WDL compensator.
    Type: Application
    Filed: August 4, 2006
    Publication date: February 8, 2007
    Applicant: JDS Uniphase Corporation
    Inventors: Bo Chen, Xishe Liu, Yatao Yang, Bo Cai