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. 25, 2015
Filed:
Jul. 30, 2014
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto, JP;
Hiroshi Watanabe, Nagaokakyo, JP;
Atsushi Tate, Chigasaki, JP;
Takayuki Kona, Nagaokakyo, JP;
Ippei Matsubara, Nagaokakyo, JP;
Keiji Iwata, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A vertical cavity surface emitting laser includes an active layer that includes a quantum well, a first cladding layer and a second cladding layer between which the active layer is interposed. A first multilayer reflector layer is arranged on a side of the first cladding layer opposite to that on which the active layer is arranged. A second multilayer reflector layer is arranged on a side of the second cladding layer opposite to that on which the active layer is arranged. At least one of the first cladding layer and the second cladding layer includes a low activity energy layer having a band gap that is smaller than a smallest band gap of an optical confinement layer for forming the quantum well of the active layer and larger than a band gap of the quantum well.