12 January 2018 High-power all fiber-integrated linearly polarized picosecond ytterbium-doped master-oscillator power amplifier
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We demonstrated an all-fiber-integrated linearly-polarized picosecond ytterbium-doped master-oscillator power-amplifier system, which yielded 225-W of average output power and the corresponding slope efficiency is 70.5%. The seed source was a compact passively mode-locked polarization-maintaining ytterbium-doped all-fiber oscillator with a pulse duration of 80-ps at 58.2-MHz repetition rate. In combination with two pre-amplifiers and a large-mode-area polarization-maintaining ytterbium-doped all-fiber master amplifier, output pulse energy up to 3.8-μJ with 48.3-kW pulse peak power was obtained without the need of complex free-space coupling and output setups. The polarization extinction ratio were measured to be 14.5 dB and the beam quality M2 factors was less than 1.49 in the both orthogonal directions at maximum output power.
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Chang Hong, Chang Hong, Jiang Liu, Jiang Liu, Ruoyu Sun, Ruoyu Sun, Yuhang Shi, Yuhang Shi, Yu Wang, Yu Wang, Pu Wang, Pu Wang, "High-power all fiber-integrated linearly polarized picosecond ytterbium-doped master-oscillator power amplifier", Proc. SPIE 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 106190E (12 January 2018); doi: 10.1117/12.2295545; https://doi.org/10.1117/12.2295545

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