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High power 938 nanometer fiber laser and amplifier

United States Patent

May 2, 2006
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An optical fiber amplifier includes a length of silica optical fiber having a core doped with neodymium, a first cladding and a second cladding each with succeeding lower refractive indices, where the first cladding diameter is less than 10 times the diameter of the core. The doping concentration of the neodymium is chosen so that the small signal absorption for 816 nm light traveling within the core is less than 15 dB/m above the other fiber losses. The amplifier is optically pumped with one laser into the fiber core and with another laser into the first cladding.
Dawson; Jay W. (Livermore, CA), Liao; Zhi Ming (Pleasanton, CA), Beach; Raymond J. (Livermore, CA), Drobshoff; Alexander D. (Livermore, CA), Payne; Stephen A. (Castro Valley, CA), Pennington; Deanna M. (Livermore, CA), Hackenberg; Wolfgang (Munich, DE), Calia; Domenico Bonaccini (Garching, DE), Taylor; Luke (Montauban de Bretagne, FR)
The Regents of the University of California (Oakland, CA)
10/ 674,513
September 29, 2003
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.