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:
Sep. 05, 1978
Filed:
Aug. 03, 1976
Ivan Paul Kaminow, Tinton Falls, NJ (US);
Herwig Werner Kogelnik, Fair Haven, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
It is known to form an optical waveguiding thin film on a substrate. For various practical reasons, it is often desired that an optical beam coupled to the film be laterally confined so as to propagate only in a longitudinal stripe portion of the film. As disclosed herein, this is accomplished by depositing spaced-apart elements in contact with one surface of the film to establish in a narrow longitudinal region of the film between the elements an effective index of refraction that is higher than the index of the remainder of the film. In this way a longitudinal waveguiding stripe is formed on the film without the necessity of irradiating, etching or otherwise directly treating the film itself.