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. 13, 2001
Filed:
Aug. 09, 1999
Shijun Jiang, Wakefield, RI (US);
Steven P. Bastien, Narragansett, RI (US);
Mala Krishnan, Wakefield, RI (US);
Optigain, Inc., Peace Dale, RI (US);
Abstract
A DFB fiber laser comprises a single-mode, rare-earth doped optical fiber having a uniform Bragg grating with a reflectivity of about 90%, and a single-mode, hi-birefringent optical fiber having a uniform Bragg grating with a reflectivity of near 100%. The output end of the hi-bi fiber is coupled to the input end of the doped fiber to form an asymmetrical fiber laser cavity. The input end of the hi-bi fiber is pumped by a light source (laser diode) having a wavelength in the absorption range of the doped fiber. Pump light entering the hi-bi fiber is passed into the doped fiber to produce a stimulated output. The hi-bi fiber provides single polarization operation, acts as an end reflector to provide single longitudinal mode operation in the laser cavity while also providing single sided output.