Tailored vortex lasing based on hybrid waveguide-grating architecture in solid-state crystal

We report a hybrid waveguide-grating vortex laser emitter processed based on femtosecond laser direct writing of the Nd:YVO4 crystal. The cladding waveguide together with the fork grating features both excellent single-mode guidance and vortex diffraction properties. The confocal micro-Raman charact...

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Bibliographic Details
Published inApplied physics letters Vol. 120; no. 21
Main Authors Zhuang, Yu, Wang, Shixiang, Chen, Zhixiang, Jia, Yuechen, Zhang, Weigang, Yao, Yicun, Ren, Yingying, Chen, Feng, Liu, Hongliang
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 23.05.2022
Subjects
Applied physics
Diffraction propagation
Direct laser writing
Electron beams
Emitters
Lasers
Refractivity
Steering
Vortices
Waveguides
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Summary:We report a hybrid waveguide-grating vortex laser emitter processed based on femtosecond laser direct writing of the Nd:YVO4 crystal. The cladding waveguide together with the fork grating features both excellent single-mode guidance and vortex diffraction properties. The confocal micro-Raman characterization results reveal the mechanism of the periodic refractive index modulation of the fork grating. Vortex lasers at the milliwatt level are achieved at a wavelength of 1064.7 nm under optical pump laser at 809.3 nm. The numerical simulation of the near-field diffraction propagation demonstrates the generation process of the vortex beams. Our results suggest that the waveguide-grating configuration is of great potential for optical-field steering applications in integrated photonics.
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ISSN:0003-6951
1077-3118
DOI:10.1063/5.0094288