Patents by Inventor Ka-Lo Yeh

Ka-Lo Yeh 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).

  • Phase-matched terahertz emitter
    Patent number: 7601977
    Abstract: Methods and apparatus are disclosed for directing optical radiation to make multiple passes across an extended region of an electro-optic material, where during each pass the electro-optic material converts a portion of the optical radiation into terahertz radiation, and where the optical radiation is directed into the electro-optic material to cause an amplitude of the terahertz radiation generated from one or more earlier passes of the optical radiation to be constructively enhanced by the terahertz radiation generated from a later pass of the optical radiation.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: October 13, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Ka-Lo Yeh, Eric Statz, Keith A. Nelson
  • Phase-matched terahertz emitter
    Publication number: 20080265165
    Abstract: Methods and apparatus are disclosed for directing optical radiation to make multiple passes across an extended region of an electro-optic material, where during each pass the electro-optic material converts a portion of the optical radiation into terahertz radiation, and where the optical radiation is directed into the electro-optic material to cause an amplitude of the terahertz radiation generated from one or more earlier passes of the optical radiation to be constructively enhanced by the terahertz radiation generated from a later pass of the optical radiation.
    Type: Application
    Filed: December 13, 2006
    Publication date: October 30, 2008
    Inventors: Ka-Lo Yeh, Eric Statz, Keith A. Nelson