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:
Apr. 01, 2003
Filed:
Feb. 01, 2000
Mats Hagberg, Västra Frölunda, SE;
Robert J. Lang, San Jose, CA (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
A broad stripe semiconductor laser has a folded cavity that permits the laser to produce output powers into a high quality beam with low divergence. The folded cavity includes a first material region disposed within the cavity having a first refractive index and a second material region having a second refractive index less than the first refractive index, and forming a first interface with the first material region. The first interface is disposed to reflect a lowest order reflection mode light beam propagating within the first material region. The first interface is disposed at a predetermined angle so that the lowest order reflection mode intracavity light beam is incident on the first interface at an angle below the critical total internal reflection angle, and higher order reflection modes are incident on the first interface at angles in excess of the total internal reflection critical angle. The interface may be curved to control the divergence to the light emitted from the cavity.