Patents by Inventor Ngai C. Wong

Ngai C. Wong 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).

  • Optical frequency counter/synthesizer apparatus
    Patent number: 5233462
    Abstract: One or more optical parametric oscillators are arrayed selectively singly, serially, and/or in parallel, and each oscillator is responsive to an input pump beam having a fractional stability to produce output signal and idler beams having fractional stabilities that correspond to or are better than the fractional stability of the pump beam and in such a way that the sum of the frequencies of the output signal and idler beams of each optical parametric oscillator is constrained to be equal to the frequency of the input beam thereof. One or more beat detectors are responsive to selected one or more signal and idler beams and reference beams of already known frequency and fractional stability to provide one or more beat detection signals having linewiThis invention was made with government support under Contact Number DAAL03-90-G-0128 awarded by the Department of the Army and under Grant Number 60NANBOD1052 awarded by the Department of Commerce. The government has certain rights in the invention.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: August 3, 1993
    Assignee: Massachusetts Institute of Technology
    Inventor: Ngai C. Wong
  • Optical parametric oscillator wideband frequency comb generator
    Patent number: 5177633
    Abstract: One or more optical parametric oscillators are arrayed selectively singly, serially, and/or in parallel, and each oscillator is responsive to an input pump beam having a fractional stability to produce output signal and idler beams having fractional stabilities that correspond to or are better than the fractional stability of the pump beam and in such a way that the sum of the frequencies of the output signal and idler beams of each optical parametric oscillator is constrained to be equal to the frequency of the input beam thereof.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: January 5, 1993
    Assignee: Massachusetts Institute of Technology
    Inventor: Ngai C. Wong
  • Ultrahigh-resolution optical parametric oscillator frequency measurement and synthesis system
    Patent number: 5070260
    Abstract: One or more optical parametric oscillators are arrayed selectively singly, serially, and/or in parallel, and each oscillator is responsive to an input pump beam having a fractional stability to produce output signal and idler beams having fractional stabilities that correspond to or are better than the fractional stability of the pump beam and in such a way that the sum of the frequencies of the output signal and idler beams of each optical parametric oscillator is constrained to be equal to the frequency of the input beam thereof.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 3, 1991
    Assignee: Massachusetts Institute of Technology
    Inventor: Ngai C. Wong