Acta Optica Sinica, Volume. 42, Issue 10, 1005001(2022)
Generation of High-Order Bessel Beam Vortex Based on Phase-Only Spatial Light Modulator and Checkerboard Phase Lattice Method
At present, the commonly used complex amplitude modulation method of light field is mainly realized by diffraction effect, which results in low energy utilization efficiency. Therefore, based on the phase-only spatial light modulator (SLM) and checkerboard phase lattice method, the generation of high-order Bessel vortex beam at zeroth-order of diffraction is realized. First, the basic principles of the Nyquist grating and checkerboard phase lattice method are introduced, the complex amplitude modulation method for generation of Bessel vortex beam at zeroth-order of diffraction is derived, and the corresponding hologram is coded. The light field distributions of low-order and high-order Bessel vortex beams generated by this method are simulated respectively. Then, the corresponding experimental optical paths are built based on the phase-only SLM, and the low-order and high-order Bessel vortex beams are prepared respectively. Finally, the advantages and disadvantages of this method are discussed. The experimental results show that the mode purity of the high-order Bessel vortex beam generated by this method is not as good as that of the first-order diffraction, but the diffraction efficiency can be increased by about 4.5 times.
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Ruijian Li, Yuan Ren, Tong Liu, Chen Wang, Rusheng Sun. Generation of High-Order Bessel Beam Vortex Based on Phase-Only Spatial Light Modulator and Checkerboard Phase Lattice Method[J]. Acta Optica Sinica, 2022, 42(10): 1005001
Category: Diffraction and Gratings
Received: Nov. 26, 2021
Accepted: Dec. 13, 2021
Published Online: May. 10, 2022
The Author Email: Ren Yuan (renyuan_823@aliyun.com)