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Proceedings Paper

Large-mode-area double-clad fibers for pulsed and CW lasers and amplifiers
Author(s): David Machewirth; Victor Khitrov; Upendra Manyam; Kanishka Tankala; Adrian Carter; Jaroslaw Abramczyk; Julia Farroni; Douglas Guertin; Nils Jacobson
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Paper Abstract

The advent of double clad fiber technology has made high power lasers and amplifiers possible. However, the scalability of output powers can be limited by amplified spontaneous emission and nonlinear processes such as stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS). These limitations can be overcome by using low numerical apertures (NAs), large-mode areas (LMAs), novel index profiles and high dopant concentrations. This paper discusses advances made in design and fabrication of highly efficient, large-mode area double clad fibers. Experimental and modeling results pertaining to changes in mode area, resultant power density and nonlinear threshold with changing core size are discussed. In addition, the mechanical reliability of the LMA fibers is discussed.

Paper Details

Date Published: 7 June 2004
PDF: 11 pages
Proc. SPIE 5335, Fiber Lasers: Technology, Systems, and Applications, (7 June 2004); doi: 10.1117/12.528056
Show Author Affiliations
David Machewirth, Nufern (United States)
Victor Khitrov, Nufern (United States)
Upendra Manyam, Nufern (United States)
Kanishka Tankala, Nufern (United States)
Adrian Carter, Nufern (United States)
Jaroslaw Abramczyk, Nufern (United States)
Julia Farroni, Nufern (United States)
Douglas Guertin, Nufern (United States)
Nils Jacobson, Nufern (United States)

Published in SPIE Proceedings Vol. 5335:
Fiber Lasers: Technology, Systems, and Applications
L. N. Durvasula, Editor(s)

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