Self-starting all-fiber PM Er:laser mode locked by a biased nonlinear amplifying loop mirror<xref rid="cpb_28_12_124203fn1" ref-type="fn">*</xref><fn id="cpb_28_12_124203fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61805282, 11802339, and 11504420), the Opening Foundation of State Key Laboratory of High Performance Computing, China (Grant No. 201601-02), the Open Research Fund of Hunan Provincial Key Laboratory of High Energy Technology, China (Grant No. GNJGJS03), the Opening Foundation of State Key Laboratory of Laser Interaction with Matter, China (Grant No. SKLLIM1702), and the China Postdoctoral Innovation Science Foundation (Grant No. BX20180373).</p></fn>

Self-starting all-fiber PM Er:laser mode locked by a biased nonlinear amplifying loop mirror**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61805282, 11802339, and 11504420), the Opening Foundation of State Key Laboratory of High Performance Computing, China (Grant No. 201601-02), the Open Research Fund of Hunan Provincial Key Laboratory of High Energy Technology, China (Grant No. GNJGJS03), the Opening Foundation of State Key Laboratory of Laser Interaction with Matter, China (Grant No. SKLLIM1702), and the China Postdoctoral Innovation Science Foundation (Grant No. BX20180373).

Yin Ke^{1, 3}, Li Yi-Ming², Wang Yan-Bin⁴, Zheng Xin¹, Jiang Tian^{2, †}

Schematic diagram of the ultrafast Er:laser. LD: laser diode, WDM: wavelength division multiplexer, ISO: isolator, EDF, Er-doped fiber. Inset shows the package of Er:laser with a size of 180 mm × 200 mm × 25 mm.