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Yb-doped Large Pitch Fiber with 105 µm mode field diameter

: Jansen, F.; Stutzki, F.; Eidam, T.; Rothhardt, J.; Hädrich, S.; Carstens, H.; Jauregui, C.; Limpert, J.; Tünnermann, A.

Institute of Electrical and Electronics Engineers -IEEE-; Optical Society of America -OSA-, Washington/D.C.:
Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2011. Vol.3 : Los Angeles, California, USA, 6 - 10 March 2011
Piscataway: IEEE, 2011
ISBN: 978-1-4577-0213-6
Optical Fiber Communication Conference and Exposition (OFC) <2011, Los Angeles/Calif.>
National Fiber Optic Engineers Conference (NFOEC) <2011, Los Angeles/Calif.>
Fraunhofer IOF ()

We present an active Yb-doped Large Pitch Fiber design with 105 m mode field diameter. The fiber was tested in a fiber CPA system delivering sub 500 fs, 2 mJ pulses with 3.8 GW peak power. The limiting influence of anticrossings on beam quality and average output power is discussed.