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:
Dec. 18, 2001
Filed:
Nov. 22, 1999
Laura Ellen Adams, Basking Ridge, NJ (US);
Clyde George Bethea, Franklin, NJ (US);
Lars Erik Eskildsen, Lyngby, DK;
Gerald Nykolak, Long Beach Long Island, NY (US);
Rossevelt People, Plainfield, NJ (US);
Tawee Tanbun-Ek, Califon, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and a second waveguide, forms a cavity resonator with the DFB region. A tuning voltage applied to the composite reflector induces refractive index changes, thereby allowing the center wavelength to be altered. A dither signal applied the composite reflector broadens the spectrum of the laser output, thereby reducing SBS in fiber optic systems