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:
Dec. 28, 1993
Filed:
Jun. 04, 1992
Yoshikazu Hori, Tokyo, JP;
Fumihiro Sogawa, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A phase lock type semiconductor laser comprising: an array type semiconductor laser main body which includes a plurality of line-shaped active layers having wave guides disposed in parallel with each other, these active layers having waveguide modes optically coupled with each other, and a reflection-type light diffraction element executing a light return or feedback in such a manner that only a specific wavelength beam among emitted beams of coupling modes which are emitted from one end surface of the semiconductor laser main body in terms of a line-shaped light source can be directly focused on the same one end surface of the semiconductor laser main body in a line-shaped.