25 August 2015 All fiber actively mode-locked fiber laser emitting cylindrical vector beam
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We demonstrated an all fiber actively mode-locked laser emitting cylindrical vector beam. A few-mode fiber Bragg grating is adopted to achieve mode selecting and spectrum filtering. An offset splicing of single-mode fiber with fourmode fiber is utilized as a mode coupler in the laser cavity. A LiNbO3 Mach-Zehnder modulator is used to achieve active mode locking in the laser. The laser operates at 1547nm with 30 dB spectrum width of 0.3nm. The emitted modelocked pulses have a duration of 1ns and repetition of 12.06MHz. Both radially and azimuthally polarized beams have been obtained with very good modal symmetry by adjusting the polarization in the laser cavity.
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Yong Zhou, Yong Zhou, Anting Wang, Anting Wang, Chun Gu, Chun Gu, Lixin Xu, Lixin Xu, Qiwen Zhan, Qiwen Zhan, } "All fiber actively mode-locked fiber laser emitting cylindrical vector beam", Proc. SPIE 9572, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII, 957204 (25 August 2015); doi: 10.1117/12.2187421; https://doi.org/10.1117/12.2187421

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