Large mode area double-clad ytterbium-doped spun tapered fiber

Posted on 24.11.2021 - 18:21
A comparative study of Yb-doped double-clad large mode area (MFD = 31 µm) spun tapered fibers with different pitch lengths was carried out in this work. Spun tapered fibers with 7.5, 15, and 30 mm pitch lengths, internal birefringence as low as ~10-8, and perfect output beam quality (M2 < 1.2) have been manufactured and investigated. Picosecond MOPA system (95 ps/100 MHz, 1064 nm) based on spun active tapered fiber with average output power of 71 W (gain 32 dB, 74% slope efficiency) was presented. Efficient green light generation (λ = 532 nm) with 17 W average power (1.7 µJ) and 80 pm linewidth was demonstrated using the developed MOPA system.


Fedotov, Andrei; Ustimchik, Vasiliy; Rissanen, Joona; Noronen, Teppo; Gumenyuk, Regina; Kolosovskiy, Alexander; et al. (2021): Large mode area double-clad ytterbium-doped spun tapered fiber. Optica Publishing Group. Collection.
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Journal of the Optical Society of America B


Andrei Fedotov
Vasiliy Ustimchik
Joona Rissanen
Teppo Noronen
Regina Gumenyuk
Alexander Kolosovskiy
Victor Voloshin
Igor Vorob'ev
Yuri Chamorovsky
Valery Filippov



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