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Narrow linewidth single mode fiber amplifier with 2.3 kw average power

: Nold, J.; Strecker, M.; Liem, A.; Eberhardt, R.; Schreiber, T.; Tünnermann, A.

Optical Society of America -OSA-, Washington/D.C.:
European Conference on Lasers and Electro-Optics 2015 : European Quantum Electronics Conference, Munich, Germany, 21–25 June 2015
Washington, DC: OSA, 2015
ISBN: 978-1-4673-7475-0
Paper CJ 11 4
European Conference on Lasers and Electro-Optics (CLEO Europe) <2015, Munich>
European Quantum Electronics Conference (EQEC) <2015, Munich>
Fraunhofer IOF ()

The fast scaling of extracted average power from single-mode fiber lasers and amplifiers around 1 μm slowed down due to the fundamental limits arising from nonlinear optical effects. For continuous wave radiation, either stimulated Raman scattering (SRS), for broadband emission, or stimulated Brillouin scattering (SBS) in the case of narrow linewidth are limiting the output power even in large-mode area fibers. In oscillator configuration, Ytterbium (Yb) -doped fiber lasers are limited in their linewidth due to spectral broadening (several nm) and SRS [1]. Current state of the art narrow linewidth (~GHz) single mode fiber amplifers are reported at a 1 kW level [2].