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:
May. 03, 2011
Filed:
Mar. 20, 2007
Kyosuke Sakai, Kyoto, JP;
Eiji Miyai, Kyoto, JP;
Susumu Noda, Uji, JP;
Dai Ohnishi, Kyoto, JP;
Wataru Kunishi, Kyoto, JP;
Kyosuke Sakai, Kyoto, JP;
Eiji Miyai, Kyoto, JP;
Susumu Noda, Uji, JP;
Dai Ohnishi, Kyoto, JP;
Wataru Kunishi, Kyoto, JP;
Kyoto University, Kyoto-Shi, JP;
Rohm Co., Ltd., Kyoto-Shi, JP;
Abstract
An objective of the present invention is to provide a surface emitting laser capable of selectively generating a laser oscillation in the fundamental mode and thereby emitting a single-wavelength laser light. In a surface emitting laser including an active layer and a two-dimensional photonic crystal provided on one side of the active layer, a reflectororis provided at least at a portion of the circumference of the two-dimensional photonic crystal. The reflector has a reflectance distribution in which the reflectance has a maximum value at a position where the amplitude envelope of the fundamental mode of an internal resonance light created within the two-dimensional photonic crystal. This design strengthens the fundamental mode while suppressing the second mode, thus enabling the laser oscillation in the fundamental mode to be selectively obtained, so that a single-wavelength laser light can be emitted.