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. 2019 Aug 5;10(9):4437–4449. doi: 10.1364/BOE.10.004437

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Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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Fig. 1. — Schematic experimental setup. SAM: saturable absorber mirror; Yb³⁺: Yb-doped fiber; CFBG: chirped fiber Bragg grating; DC-Yb³⁺: double-clad Yb-doped fiber; SMF: single-mode fiber; PCF: photonic-crystal fiber.