Patents by Inventor L. J. Qian

L. J. Qian 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).

  • Femtosecond kerr-lens mode locking with negative nonlinear phase shifts
    Publication number: 20020003440
    Abstract: A Kerr-lens mode-locked Cr:fosterite laser 15 operated with negative nonlinear phase shift. The nonlinear phase shift is induced by the cascade x(2) x(2) process in a lithium triborate crystal. Employing the cascade process at large phase mismatch produces a nearly linear frequency chirp. Transform-limited pulses as short as 60 fs are generated with positive cavity dispersion.
    Type: Application
    Filed: January 16, 2001
    Publication date: January 10, 2002
    Inventors: L. J. Qian, Xiang Liu, Frank W. Wise