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- W4225247731 abstract "In this Letter, we demonstrate a monolithic high-power master oscillator power amplifier by using a home-made double-clad tapered Yb-doped fiber (T-YDF) with an input end of ∼20/400 µm and an output end of ∼30/600 µm. Thanks to perfect core/cladding matching with the fiber components at both ends of the T-YDF, the laser is pumped bidirectionally and an output power of over 4 kW with a high slope efficiency of 84.1% and excellent beam quality M2 ∼ 1.46 is achieved. In contrast to previous work on common fiber lasers, experimental results also reveal that the co-pump scheme has a higher transverse mode instability (TMI) threshold and power-boosting capability than that of a counter-pump scheme. To the best of our knowledge, this is the highest output power demonstrated to date from such a T-YDF with excellent beam quality. This work indicates the great potential of the T-YDF to realize further power scaling, high laser efficiency, and excellent beam quality in high-power fiber lasers." @default.
- W4225247731 created "2022-05-04" @default.
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- W4225247731 date "2022-04-19" @default.
- W4225247731 modified "2023-10-14" @default.
- W4225247731 title "Tapered Yb-doped fiber enabled a 4 kW near-single-mode monolithic fiber amplifier" @default.
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- W4225247731 doi "https://doi.org/10.1364/ol.457529" @default.
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