Progress on Kilowatt-Level Amplifiers for Beam Combining
February 23, 2010
By: John Edgecumbe, David Björk, Joshua Galipeau, Gary Boivin, Thomas Ehrenreich, Scott Christensen, Bryce Samson, Kanishka Tankala
The technology to deliver narrow linewidth, single mode optical power from a fiber amplifier at the 1kW power level has been demonstrated over the last 12 months. In this paper we present measurements which address the suitability of these fiber amplifiers for various beam combining schemes, including coherent beam combining. Data on SBS induced intensity noise, phase noise at kW level output powers, and SBS threshold as a function of input seed linewidth are presented. Examples of several delivered systems will also be presented along with a discussion on future development efforts in higher power fiber amplifiers.
Copyright 2009, Solid State and Diode Laser Technology Review, Directed Energy Professional Society
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