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7 March 2019 Large-mode-area double clad ytterbium-doped tapered fiber with circular birefringence
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Abstract
We demonstrated, for the first time to our best knowledge, an active tapered double clad fiber with circular birefringence and 35 μm core diameter. The output radiation had perfect beam quality (M2=1.18/1.1) and linearly polarized light with 15 dB of PER. The developed double clad active fiber was investigated for amplification of picosecond pulses in allfiber MOPA system. The MOPA system delivered 50 ps pulses with 55 W of the average power revealed 34.4 dB gain of the booster amplifier.
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Joona Rissanen, Andrei Fedotov, Teppo Noronen, Regina Gumenyuk, Yuri Chamorovskiy, Alexander Kolosovskii, Victor Voloshin, Igor Vorobev, Maxim Odnoblyudov, and Valery Filippov "Large-mode-area double clad ytterbium-doped tapered fiber with circular birefringence", Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 1089725 (7 March 2019); https://doi.org/10.1117/12.2508811
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