Multi-watt amplification in a birefringent Yb:LiLuF4 single crystal fiber grown by micro-pulling-down
We present, to the best of our knowledge, the first demonstration of a single crystal fiber solid-state amplifier based on a birefringent Yb3+-doped thin crystal grown by the micro-pulling-down method. We measured a small signal gain >30 in a four-passes Yb:LiLuF4 amplifier pumping with a 120-W m...
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Veröffentlicht in: | Optics letters 2019-09, Vol.44 (17), p.4095-4098 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We present, to the best of our knowledge, the first demonstration of a single crystal fiber solid-state amplifier based on a birefringent Yb3+-doped thin crystal grown by the micro-pulling-down method. We measured a small signal gain >30 in a four-passes Yb:LiLuF4 amplifier pumping with a 120-W maximum power fiber-coupled laser diode. At an absorbed pump power of 80 W, a maximum output power of 8.4 W was obtained seeding the 42-mm-long, 2%Yb3+-doped single crystal fiber sample with 0.8 W at 1021 nm. Even at the maximum incident pump power, the amplified laser beam polarization and spatial quality were excellent (M2=1.15×1.06). |
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ISSN: | 0146-9592 1539-4794 |
DOI: | 10.1364/OL.44.004095 |