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:
Sep. 06, 2005
Filed:
Mar. 28, 2001
James Christopher O'gorman, Dublin, IE;
Frederick Paul Logue, Meath, IE;
James Christopher O'Gorman, Dublin, IE;
Frederick Paul Logue, Meath, IE;
Abstract
A laser diode () for outputting light of a single mode comprises a substrate layer (), a cladding layer () and a compound light propagating layer () comprising first, second, third and fourth layers (to). A wave guiding region () of refractive index lower than its adjacent regions is defined by the third layer () by two quantum wells () positioned at the anti-node of light of a single mode which is propagating in the third layer () for propagating and amplifying the single mode light. A central ridge () locates the wave guiding region transversely of the direction of light propagation. The wave guiding region () can also be defined by shaping the top cladding layer () by forming an elongated central channel through the central ridge ().