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Experimental and Theoretical Study of Linearly Polarized Lorentz-Gauss Beams with Heterogeneous Distribution [Early Posting]

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摘要

The unevenly distributed Lorentz-Gaussian beams are difficult to reproduce in practice, (R2-Q1) because it requires modulation in both amplitude and phase terms. Here a new linearly polarized Lorentz-Gauss beam modulated by a helical axicon (LGB-HA) is calculated and the two various experimental generation methods of this beam, (R2-2-Q1) Fourier Transform Method (FTM) and Complex-Amplitude Modulation (CAM) method are depicted. Compared with Fourier Transform Method, Complex-Amplitude Modulation method can modulate the phase and amplitude simultaneously by only one reflection-type phase-only liquid crystal spatial light modulator. Both the two methods are coincident with the numerical results. (R1-Q6) (R2-Q2) Yet the Complex-Amplitude Modulation is more simple, efficient and has a higher degree of conformance through data comparison. (R1-Q6) (R2-Q2) In addition, considering some barriers existed in shaping and reappearing the complicated Lorentz-Gauss beam with heterogeneous distribution, the evolution regularities of the beams with different parameters (B, n, m) were also implemented.

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Wang Guanxue,Miao Yu,Li Yang,Shan Xinzhi,Gao Xiumin. Experimental and Theoretical Study of Linearly Polarized Lorentz-Gauss Beams with Heterogeneous Distribution[J].Chinese Optics Letters,2021,19(2):02.