Vortex beam array generated by a volume compound fork grating in lithium niobite
Here, we report a generation of vortex beam array based on a micro volume compound fork grating fabricated by a femtosecond laser direct writing technique in lithium niobite crystal. The grating is able to convert a Gaussian laser beam into an array of large number of vortex beams with high purity a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379721002424 |
| _version_ | 1818642330698121216 |
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| author | Yu Zhuang Quanxin Yang Pengfei Wu Weigang Zhang Yingying Ren Hongliang Liu |
| author_facet | Yu Zhuang Quanxin Yang Pengfei Wu Weigang Zhang Yingying Ren Hongliang Liu |
| author_sort | Yu Zhuang |
| collection | DOAJ |
| description | Here, we report a generation of vortex beam array based on a micro volume compound fork grating fabricated by a femtosecond laser direct writing technique in lithium niobite crystal. The grating is able to convert a Gaussian laser beam into an array of large number of vortex beams with high purity and high diffraction efficiency. The intensity distribution and the topological charges of the vortex beams are investigated, indicating there are multiple pairs of vortex beams with opposite topological charges in the array. Interference synthesizing method is also studied to superpose the opposite order vortex beams to produce integer-order vector-vortex beams, in addition to the generation of the fraction-order vector-vortex beam. The theoretical calculation and the experiment polarization measurement results indicate that the beams produced have spatial anisotropic polarization distribution. The micro structure of the compound fork grating has potential applications in generating vector-vortex beams in integrated optics field. |
| first_indexed | 2024-12-16T23:41:21Z |
| format | Article |
| id | doaj.art-2bf1df06d8f04073b24eae262892ea21 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-16T23:41:21Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-2bf1df06d8f04073b24eae262892ea212022-12-21T22:11:35ZengElsevierResults in Physics2211-37972021-05-0124104083Vortex beam array generated by a volume compound fork grating in lithium niobiteYu Zhuang0Quanxin Yang1Pengfei Wu2Weigang Zhang3Yingying Ren4Hongliang Liu5Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, ChinaTianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, ChinaTianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, ChinaTianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, China; Corresponding authors at: Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, China (H. Liu).Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250358, ChinaTianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, China; State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; Corresponding authors at: Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Insititute of Modern Optics, Nankai University, Tianjin 300350, China (H. Liu).Here, we report a generation of vortex beam array based on a micro volume compound fork grating fabricated by a femtosecond laser direct writing technique in lithium niobite crystal. The grating is able to convert a Gaussian laser beam into an array of large number of vortex beams with high purity and high diffraction efficiency. The intensity distribution and the topological charges of the vortex beams are investigated, indicating there are multiple pairs of vortex beams with opposite topological charges in the array. Interference synthesizing method is also studied to superpose the opposite order vortex beams to produce integer-order vector-vortex beams, in addition to the generation of the fraction-order vector-vortex beam. The theoretical calculation and the experiment polarization measurement results indicate that the beams produced have spatial anisotropic polarization distribution. The micro structure of the compound fork grating has potential applications in generating vector-vortex beams in integrated optics field.http://www.sciencedirect.com/science/article/pii/S2211379721002424Fork gratingFemtosecond laser direct writingVortex beam arrayVector-vortex beam |
| spellingShingle | Yu Zhuang Quanxin Yang Pengfei Wu Weigang Zhang Yingying Ren Hongliang Liu Vortex beam array generated by a volume compound fork grating in lithium niobite Results in Physics Fork grating Femtosecond laser direct writing Vortex beam array Vector-vortex beam |
| title | Vortex beam array generated by a volume compound fork grating in lithium niobite |
| title_full | Vortex beam array generated by a volume compound fork grating in lithium niobite |
| title_fullStr | Vortex beam array generated by a volume compound fork grating in lithium niobite |
| title_full_unstemmed | Vortex beam array generated by a volume compound fork grating in lithium niobite |
| title_short | Vortex beam array generated by a volume compound fork grating in lithium niobite |
| title_sort | vortex beam array generated by a volume compound fork grating in lithium niobite |
| topic | Fork grating Femtosecond laser direct writing Vortex beam array Vector-vortex beam |
| url | http://www.sciencedirect.com/science/article/pii/S2211379721002424 |
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