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:
Jul. 29, 2003
Filed:
Nov. 05, 2001
Applicant:
Inventors:
Simarjeet Saini, Columbia, MD (US);
Peter J. S. Heim, Washington, DC (US);
Assignee:
Quantum Photonics, Inc, Jessup, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/12 ; H01S 5/026 ;
U.S. Cl.
CPC ...
G02B 6/12 ; H01S 5/026 ;
Abstract
An optical device is provided comprising a gain section adapted to emit radiation at a radiation wavelength, a coupling section adjacent to the gain section for transitioning radiation between an active waveguide and a passive waveguide, and a passive section adjacent to the coupling section supporting a single-lobed optical mode in the passive waveguide at the radiation wavelength. The passive waveguide has an index of refraction and dimension such that the confinement of the radiation within the active waveguide in the gain section is reduced.