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Tapered Yb-doped fiber enabled monolithic high-power linearly polarized single-frequency laser

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Abstract

The all-fiber high-power linearly polarized single-frequency fiber laser based on the polarization-maintaining tapered Yb-doped fiber (T-YDF) is systematically studied. As a result, a 300 W-level stable output with linear polarization and nearly diffraction-limited beam quality is demonstrated. In particular, the overall properties of the transverse mode instability (MI) effect in such a single-frequency laser system are discussed in detail for the first time, to the best of our knowledge, including temporal, frequency, polarization, and spatial domains. Furthermore, the beam pointing error taking the MI effect into account is investigated. Theoretical analyses covering both stimulated Brillouin scattering and the MI effects reveal the great potential of the T-YDF for further power scaling as well.

© 2020 Optical Society of America

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Supplementary Material (5)

NameDescription
Visualization 1       This video records the beam profile at the output power of 288.8 W that is captured by a high-speed camera. It is associated with Fig. 5(a) in the manuscript.
Visualization 2       This video records the beam profile at the output power of 300.2 W that is captured by a high-speed camera. It is associated with Fig. 5(a) in the manuscript.
Visualization 3       This video records the beam profile at the output power of 368.5 W that is captured by a high-speed camera. It is associated with Fig. 5(a) in the manuscript.
Visualization 4       This video records the beam profile at the output power of 422.4 W that is captured by a high-speed camera. It is associated with Fig. 5(a) in the manuscript.
Visualization 5       This video records the beam profile at the output power of 510 W that is captured by a high-speed camera. It is associated with Fig. 5(a) in the manuscript.

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Figures (7)

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Tables (1)

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