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:
Oct. 18, 1977
Filed:
Dec. 15, 1975
Applicant:
Inventor:
Yasuharu Suematsu, Kawasaki, JA;
Assignee:
Tokyo Institute of Technology, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; H01S / ;
U.S. Cl.
CPC ...
350 / ; 2957 / ; 331 / ; 350 / ; 357 18 ;
Abstract
A multi-hetero-structure waveguide type optical integrated circuit is provided wherein a thin-film element such as a semiconductor laser is coupled through a directional coupler to a waveguide having a small transmission loss.