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26 February 2018 200-W single frequency laser based on short active double clad tapered fiber
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Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105122A (2018)
Event: SPIE LASE, 2018, San Francisco, California, United States
High power single frequency lasers are very attractive for a wide range of applications such as nonlinear conversion, gravitational wave sensing or atom trapping. Power scaling in single frequency regime is a challenging domain of research. In fact, nonlinear effect as stimulated Brillouin scattering (SBS) is the primary power limitation in single frequency amplifiers. To mitigate SBS, different well-known techniques has been improved. These techniques allow generation of several hundred of watts [1]. Large mode area (LMA) fibers, transverse acoustically tailored fibers [2], coherent beam combining and also tapered fiber [3] seem to be serious candidates to continue the power scaling. We have demonstrated the generation of stable 200W output power with nearly diffraction limited output, and narrow linewidth (Δν<30kHz) by using a tapered Yb-doped fiber which allow an adiabatic transition from a small purely single mode input to a large core output.
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Christophe Pierre, Germain Guiraud, Jean-Paul Yehouessi, Giorgio Santarelli, Johan Boullet, Nicholas Traynor, and Cyril VINCONT "200-W single frequency laser based on short active double clad tapered fiber", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105122A (26 February 2018);

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