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:
Apr. 01, 1997
Filed:
Sep. 29, 1995
Syoichi Kakimoto, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor laser device includes a semiconductor laser having a pair of facets and disposed on a semiconductor substrate and a photodiode having a light responsive surface on which a laser beam emitted from one of the facets of the semiconductor laser is incident, also disposed on the semiconductor substrate. The pair of facets of the semiconductor laser and the light responsive surface of the photodiode are both perpendicular to the surface of the semiconductor substrate, and the light responsive surface of the photodiode is disposed so that light of the laser beam reflected by the light responsive surface does not return to the emitting point of the laser beam. Therefore, return light noise generated in the semiconductor laser is avoided. In addition, the pair of facets of the semiconductor laser and the light responsive surface of the photodiode can be formed simultaneously by dry etching, thereby shortening the fabricating process.