Patents by Inventor Akira J. Ikushima

Akira J. Ikushima 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 for producing a second-order nonlinear glass material
    Patent number: 6564585
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contains Ge, H and OH and has second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonlinear glass material comprising treating a porous glass material containing Ge with hydrogen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinear glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical functional elements or the like.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: May 20, 2003
    Assignees: Shin-Etsu Chemical Co., Ltd., Toyota Technological Institute
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara
  • Second-order nonlinear glass material
    Patent number: 6380109
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contain Ge, H and OH and second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonliner glass material comprising treating a porous class material containing Ge with hydrohen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinger glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical elements or the like.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: April 30, 2002
    Assignees: Shin-Etsu Chemical Co., Ltd., Toyota Tecnological Institute
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara
  • Second-order nonlinear glass material and a method for producing it
    Publication number: 20010019991
    Abstract: There is disclosed second-order nonlinear glass material wherein a part having second-order nonlinearity contains Ge, H and OH and has second-order nonlinear optical constant d of 1 pm/V or more, and a method for producing second-order nonlinear glass material comprising treating a porous glass material containing Ge with hydrogen, sintering it and subjecting it to a ultraviolet poling treatment. There can be provided second-order nonlinear glass material having second-order nonlinearity which is a sufficiently high and has a sufficiently long lifetime for a practical purpose, in use of the glass material for optical functional elements or the like.
    Type: Application
    Filed: May 9, 2001
    Publication date: September 6, 2001
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Jun Abe, Seiki Ejima, Akira J. Ikushima, Takumi Fujiwara