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:
Aug. 19, 2014
Filed:
Feb. 18, 2011
Yutaka Ohki, Tokyo, JP;
Satoshi Arakawa, Tokyo, JP;
Shunsuke Okuyama, Tokyo, JP;
Masaki Funabashi, Tokyo, JP;
Yutaka Ohki, Tokyo, JP;
Satoshi Arakawa, Tokyo, JP;
Shunsuke Okuyama, Tokyo, JP;
Masaki Funabashi, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A semiconductor laser outputs a laser light from an output facet of a waveguide having an index waveguide structure, via a lens system. The waveguide includes, in order from a rear facet opposite to the output facet, a first narrow portion, a wide portion that is wider than the first narrow portion, a second narrow portion narrower than the wide portion, a first tapered portion formed between the first narrow portion and the wide portion, which expands toward the wide portion, and a second tapered portion formed between the wide portion and the second narrow portion, which narrows toward the second narrow portion. Each of the first narrow portion, the wide portion, and the second narrow potion has a uniform width.