22 March 2013 High order ribbon fiber modes, simulations, and experiments for high power fiber amplifiers
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Abstract
Diffraction limited fiber amplifiers in a circular geometry are likely to be limited by nonlinearities to 2 kW for narrowband and 10-36 kW for broadband lasers. We have proposed a ribbon fiber geometry to allow scaling fiber lasers above these limits in which a high order ribbon mode is amplified and converted back to the fundamental mode in free space. Novel methods of illuminating a high order ribbon fiber mode are discussed and compared with modeling and experimental results showing high purity illumination, > 90%. A 10 kW single frequency ribbon fiber amplifier design is presented and BPM simulation results verify the approach.
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Derrek Drachenberg, Derrek Drachenberg, Michael Messerly, Michael Messerly, Paul Pax, Paul Pax, Arun Sridharan, Arun Sridharan, John Tassano, John Tassano, Jay Dawson, Jay Dawson, } "High order ribbon fiber modes, simulations, and experiments for high power fiber amplifiers", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 860107 (22 March 2013); doi: 10.1117/12.2001920; https://doi.org/10.1117/12.2001920
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