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:
Mar. 27, 1990
Filed:
Nov. 05, 1987
Applicant:
Inventors:
Osamu Yamamoto, Nara, JP;
Hiroshi Hayashi, Soraku, JP;
Nobuyuki Miyauchi, Tenri, JP;
Shigeki Maei, Yamatokoriyama, JP;
Hidenori Kawanishi, Higashiosaka, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9611 ; 350 9618 ;
Abstract
A waveguide type optical head comprises a thin film waveguide of semiconductor or dielectric substance formed on a semiconductor or dielectric substrate, an optical element with an optical signal processing function provided on the thin film waveguide, and a semiconductor laser fixed on the substrate for emitting laser beam into the waveguide, and is characterized in that part of the laser beam emitted from the semiconductor laser is reflected by the incident end surface of the thin film waveguide and returned to the semiconductor laser.