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:
Oct. 22, 2013
Filed:
Sep. 14, 2011
Shingo Kameyama, Ibaraki, JP;
Hiroyuki Yukawa, Kishiwada, JP;
Shingo Kameyama, Ibaraki, JP;
Hiroyuki Yukawa, Kishiwada, JP;
Sanyo Electric Co., Ltd., Moriguchi-Shi, Osaka, JP;
Abstract
This semiconductor laser element includes a semiconductor element layer including an active layer and having an emitting side cavity facet and a reflecting side cavity facet, and a facet coating film on a surface of the emitting side cavity facet. The facet coating film includes a photocatalytic layer arranged on an outermost surface of the facet coating film and a dielectric layer arranged between the photocatalytic layer and the emitting side cavity facet. A thickness of the dielectric layer is set to a thickness defined by m×λ/(2×n) (m is an integer), where a wavelength of a laser beam emitted from the active layer is λ and a refractive index of the dielectric layer is n, and at least 1 μm.