Ultra-large mode area single frequency anisotropic MOPA with double clad Yb-doped tapered fiber

Noronen, Teppo; Fedotov, Andrei; Rissanen, Joona; Gumenyuk, Regina; Butov, Oleg; Chamorovskii, Yuri; Golant, Konstantin; Odnoblyudov, Maxim; Filippov, Valery (2018-01-01)
 
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Noronen, Teppo
Fedotov, Andrei
Rissanen, Joona
Gumenyuk, Regina
Butov, Oleg
Chamorovskii, Yuri
Golant, Konstantin
Odnoblyudov, Maxim
Filippov, Valery
01.01.2018

105121T
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doi:10.1117/12.2288942
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https://urn.fi/URN:NBN:fi:tty-201908211995

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Peer reviewed
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<p>We demonstrates all-fiber master oscillator - power amplifier delivered 70W output power at 1033.33nm with 8 kHz FWHM linewidth without any problems with SBS. The anisotropic ytterbium doped tapered double clad amplifier with 50 μm MFD and polarization extinction ratio about 30 dB is developed as a burst stage. The output radiation demonstrated perfect beam quality (M<sup>2</sup>=1.03/1.08).</p>
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