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:
Nov. 04, 1997
Filed:
Jul. 09, 1996
Hitoshi Tada, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a semiconductor laser module wherein a semiconductor laser chip having a light emitting facet and an optical fiber having a fiber facet are mounted on a module substrate so that the light emitting facet faces the fiber facet, the semiconductor laser chip includes semiconductor layers disposed on a semiconductor substrate and including a light emitting region, and the semiconductor substrate has a portion protruding beyond the light emitting facet. The optical fiber includes a core extending in the optical waveguide direction and a cladding part surrounding the core. In this module, positioning of the optical fiber in the optical axis direction is performed by abutting a portion of the cladding part at the fiber facet against the protruding portion of the substrate of the semiconductor laser chip. Therefore, alignment of the optical fiber with the laser chip in the optical axis direction is performed easily and accurately with a desired spacing between them, without contacting the light emitting facet of the laser chip to the fiber facet, whereby coupling efficiency between the laser chip and the optical fiber is significantly improved.