The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1978
Filed:
Mar. 10, 1976
Applicant:
Inventors:
Masahiro Nunoshita, Amagasaki, JA;
Yoshinori Nomura, Amagasaki, JA;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9613 ; 350358 ;
Abstract
A thin-film optical switching device has a substrate of fused quartz, an optical slab waveguide or Corning glass No. 7059, a thin film crossing a portion of the length of the waveguide, and an interdigital transducer on the substrate for generating an elastic surface wave to propagate it through the thin film. The optical waveguide, and thin film have respective parameters such that almost all energy of an optically guided wave and the elastic surface wave are concentrated into the thin film while the optically guided wave within the thin film undergoes acousto-optical interaction, that is, Bragg diffraction.