1.7 µm sub-200 fs vortex beams generation from a thulium-doped all-fiber laser

The pulsed 1.7 µm vortex beams (VBs) has significant research prospects in the fields of imaging and material processing. We experimentally demonstrate the generation of sub-200 fs pulsed VBs at 1.7 µm based on a home-made mode-selective coupler (MSC). Through dispersion management technology in a t...

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Bibliographic Details
Published in:Optics express 2023-08, Vol.31 (17), p.27858
Main Authors: Xie, Yuhua, Long, Rufei, Ma, Zuhai, Shi, Youzhi, Hong, Jiahao, Wu, Jiadong, Zhao, Chujun, Fan, Dianyuan, Chen, Yu
Format: Article
Language:English
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Summary:The pulsed 1.7 µm vortex beams (VBs) has significant research prospects in the fields of imaging and material processing. We experimentally demonstrate the generation of sub-200 fs pulsed VBs at 1.7 µm based on a home-made mode-selective coupler (MSC). Through dispersion management technology in a thulium-doped fiber laser, the stable linearly polarized VBs pulse directly emitting from the cavity is measured to be 186 fs with central wavelength of 1721.2 nm. By controlling the linear superposition of LP 11 modes, cylindrical vector beams (CVBs) can also be obtained. In addition, a variety of bound states pulsed VBs at 1.7 µm can also be observed. Our finding provides an effective way to generate ultrashort pulsed VBs and CVBs at 1.7 µm waveband.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.499015