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. 21, 2003
Filed:
Dec. 20, 2000
Si Hyung Cho, Silver Spring, MD (US);
William Crossley Dautremont-Smith, Orefield, PA (US);
Sun-Yuan Huang, Union City, CA (US);
Charles H Joyner, Red Bank, NJ (US);
Ronald Eugene Leibenguth, Palmerton, PA (US);
Abdallah Ougazzaden, Breiningsville, PA (US);
Claude Lewis Reynolds, Jr., Sinking Spring, PA (US);
TriQuint Technology Holding Co., Hillsboro, OR (US);
Abstract
The invention is a semiconductor optical device and method of fabrication where the device includes an active region with an active layer having a first index of refraction, and a blocking region having a second, lower index of refraction. A semiconductor layer having an index of refraction higher than the blocking region is formed over both the active and blocking regions so that the semiconductor layer is in closer proximity to the active layer in areas not covered by the blocking region so as to decrease the difference between the effective index of refraction in the active region and the effective refractive index of the blocking region. Such devices are particularly useful for pumping optical amplifiers since greater power can be achieved while maintaining single mode emission.