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:
Feb. 25, 1997
Filed:
Feb. 29, 1996
Won-Tien Tsang, Holmdel, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A method and apparatus for control of lasing wavelength in distributed feedback lasers using an improved waveguide. The waveguide comprises a periodic structure or grating and an active stripe which is oriented at a nonzero angle .THETA. with respect to a line perpendicular to the lines of the grating. Incremental changes in the operating wavelength of a plurality of lasers can be achieved by forming the active stripe of each waveguide of each laser at a different angle .THETA.. This method and apparatus provides a fine degree of control over the operating wavelength of distributed feedback lasers and is particularly useful in high capacity optical communications networks.