Patents by Inventor Yoshiaki Uesu

Yoshiaki Uesu 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).

  • Method of measuring the time for forming refractive index grating of a photo-nonlinear medium
    Patent number: 5303032
    Abstract: A laser beam with a wavelength .lambda. emitted from a laser beam source is split into first and second pump beams and a probe beam. The first and second pump beams are incident on light incident surfaces of a photo-nonlinear medium from opposing directions on the same optical path. The probe beam is incident on the light incident surface forming an angle with the first pump beam to generate interference fringes in the normal direction of the light incident surface and to form a refractive index grating. A phase conjugate wave is emitted in the reverse direction to an incident optical path of the probe beam by means of irradiating the second pump beam on the refractive index grating.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: April 12, 1994
    Assignee: Mitsubishi Materials Corporation
    Inventors: Yoshiaki Uesu, Jun Iba, Toshiyuki Yoshihara, Kazuyasu Hikita, Hiroyuki Iizuka