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