Large Mode Area Double-Clad Ytterbium-Doped Tapered Fiber With Low Birefringence

Andrei Fedotov,Vasilii Ustimchik,Joona Rissanen,Teppo Noronen,Regina Gumenyuk,Yuri Chamorovskii,Alexander Kolosovskii,Victor Voloshin,Igor Vorob'Ev,Valery Filippov

FIBER LASERS XVIII: TECHNOLOGY AND SYSTEMS（2021）

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摘要

We developed ytterbium-doped double-clad large mode area (MFD = 30 mu m) spun tapered fibers with low internal birefringence and perfect beam quality (M-2 < 1.2). Picosecond MOPA system (95ps/100 MHz, 1064 nm) based on proposed active tapered fiber with output average power of 64 W (gain 32 dB) is demonstrated.

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关键词

polarization, birefringence, fiber laser, active spun fiber, active tapered fiber, ultrafast fiber amplifier

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