Patents by Inventor Zhongqi Pan

Zhongqi Pan 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).

  • Autocorrelation Technique Based on Measurement of Polarization Effects of Optical Pulses
    Publication number: 20060244951
    Abstract: Autocorrelation technique for measurement of width of optical short pulses based on polarization effects. The optical pulse is split into two orthogonal polarization states and these two replicas have a relative delay which depolarizes the pulse. By tuning the relative delay of the two replicas and measuring the degree-of-polarization (DOP) of the pulse or the induced polarimetric four-wave mixing (FWM) through nonlinear media, the pulse's temporal width can be accurately derived. The technique can be all-fiber-based, wavelength independent, cost effective, applicable to low optical power, and does not require significant optical alignment.
    Type: Application
    Filed: March 3, 2006
    Publication date: November 2, 2006
    Applicant: University of Southern California
    Inventors: Ting Luo, Changyuan Yu, Zhongqi Pan, Lianshan Yan, Saurabh Kumar, Alan Willner
  • Monitoring optical dispersion based on vestigial side band optical filtering
    Patent number: 7035538
    Abstract: Techniques for monitoring frequency-dependent parameter and optical property such as optical dispersion in a modulated optical signal with sidebands based on optical vestigial sideband filtering. Monitoring implementations for both chromatic dispersion and polarization-mode dispersion are described as examples.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: April 25, 2006
    Assignee: University of Southern California
    Inventors: Alan E. Willner, Qian Yu, Zhongqi Pan, Lianshan Yan
  • Intra-bit polarization diversity modulation
    Patent number: 6646774
    Abstract: Techniques and systems for mitigating polarization-related signal degradation or distortions in birefringent optical links based on intra-bit polarization diversity modulation.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: November 11, 2003
    Inventors: Alan E. Willner, Zhongqi Pan, Yan Wang, Changyuan Yu, Ting Luo, Asaf B. Sahin, Qian Yu
  • WDM fiber amplifiers using sampled bragg gratings
    Patent number: 6621627
    Abstract: Wideband optical amplifiers that use two parallel amplifiers in different operating spectral ranges and two different or identical sampled Bragg gratings as the channel splitter and combiner.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: September 16, 2003
    Assignee: University of Southern California
    Inventors: Alan E. Willner, Zhongqi Pan, Yong Xie
  • Monitoring optical dispersion based on vestigial side band optical filtering
    Publication number: 20030123884
    Abstract: Techniques for monitoring frequency-dependent parameter and optical property such as optical dispersion in a modulated optical signal with sidebands based on optical vestigial sideband filtering. Monitoring implementations for both chromatic dispersion and polarization-mode dispersion are described as examples.
    Type: Application
    Filed: July 8, 2002
    Publication date: July 3, 2003
    Inventors: Alan E. Willner, Qian Yu, Zhongqi Pan, Lianshan Yan
  • WDM fiber amplifiers using sampled bragg gratings
    Publication number: 20020167722
    Abstract: Wideband optical amplifiers that use two parallel amplifiers in different operating spectral ranges and two different or identical sampled Bragg gratings as the channel splitter and combiner.
    Type: Application
    Filed: April 12, 2001
    Publication date: November 14, 2002
    Inventors: Alan E. Willner, Zhongqi Pan, Yong Xie
  • Tunable optical dispersion-slope compensation based on a nonlinearly-chirped bragg grating
    Patent number: 6453093
    Abstract: Techniques for using a nonlinearly-chirped fiber Bragg grating to produce tunable dispersion-slope compensation.
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: September 17, 2002
    Assignee: Univerisity of Southern California
    Inventors: Yong Xie, Sanggeon Lee, Zhongqi Pan, Alan E. Willner
  • Tunable compensation for polarization-mode dispersion using a birefringent nonlinearly-chirped bragg grating in a dual-pass configuration
    Patent number: 6400869
    Abstract: Techniques and devices for compensating polarization-mode dispersion in an optical signal by using a nonlinearly-chirped Bragg grating in a dual-pass configuration.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: June 4, 2002
    Assignee: University of Southern California
    Inventors: Zhongqi Pan, Yong Xie, Sanggeon Lee, Alan E. Willner
  • Tunable compensation for polarization-mode dispersion using a birefringent nonlinearly-chirped bragg grating in a dual-pass configuration
    Publication number: 20020015549
    Abstract: Techniques and devices for compensating polarization-mode dispersion in an optical signal by using a nonlinearly-chirped Bragg grating in a dual-pass configuration.
    Type: Application
    Filed: December 1, 2000
    Publication date: February 7, 2002
    Inventors: Zhongqi Pan, Yong Xie, Sanggeon Lee, Alan E. Willner
  • Tunable optical dispersion-slope compensation based on a nonlinearly-chirped bragg grating
    Publication number: 20010048788
    Abstract: Techniques for using a nonlinearly-chirped fiber Bragg grating to produce tunable dispersion-slope compensation.
    Type: Application
    Filed: January 8, 2001
    Publication date: December 6, 2001
    Inventors: Yong Xie, Sanggeon Lee, Zhongqi Pan, Alan E. Willner