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Proceedings Paper

High-efficient kW-level single-mode ytterbium fiber lasers in all-fiber format with diffraction-limited beam at wavelengths in 1000-1030 nm spectral range
Author(s): Nikolai Platonov; Oleg Shkurikhin; Valentin Fomin; Daniil Myasnikov; Roman Yagodkin; Anton Ferin; Alexey Doronkin; Ivan Ulyanov; Valentin Gapontsev
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Paper Abstract

The kW-level single-mode Yb fiber lasers at wavelengths in 1000 -1030nm spectral range with diffraction-limited beam and with direct diode pumping are remarkable high brightness and low quantum defect sources for tandem pumping of multi-kilowatt fiber and crystal laser systems. In this paper we present SM Yb fiber lasers in all-fiber format with powers 0.75kW, 0.90kW, 1.33kW and 1.40kW at 1007nm, 1010nm, 1018nm and 1030nm respectively with M2 values of output beams < 1.1. These are the highest powers of single mode CW Yb fiber lasers at wavelengths near 1 micron to the best of our knowledge. The fiber oscillators with direct diode pumping are highly efficient and have optical slope efficiencies from 64% at 1007nm to 78% at 1018nm relative to total laser diode pump power. The fiber lasers have 3-5m output delivery cable terminated with a LC-8 connector in dependence on power level and MFD of output fiber. The pump and non-linear process (SRS and MI) limitations are discussed.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 1126003 (21 February 2020); doi: 10.1117/12.2547021
Show Author Affiliations
Nikolai Platonov, IPG Photonics Corp. (United States)
Oleg Shkurikhin, IPG Photonics Corp. (United States)
Valentin Fomin, IPG Laser GmbH (Germany)
Daniil Myasnikov, IRE-Polus Co. (Russian Federation)
Roman Yagodkin, IPG Photonics Corp. (United States)
Anton Ferin, IPG Laser GmbH (Germany)
Alexey Doronkin, IPG Laser GmbH (Germany)
Ivan Ulyanov, IRE-Polus Co. (Russian Federation)
Valentin Gapontsev, IPG Photonics Corp. (United States)

Published in SPIE Proceedings Vol. 11260:
Fiber Lasers XVII: Technology and Systems
Liang Dong, Editor(s)

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