[7a-PA2-1~11] 3.1 Basic optics and frontier of optics

[7a-PA2-6] Wave front control with SLM and simulation of light wave diffraction

〇Man Zhang¹, Yutaka Kawabe¹, Naoki Karasawa¹, Gongjian Zhang¹ (1.Chitose Institute of Science & Technology)

Keywords:spatial light modulator, phase retrieval, vortex light wave

we conducted a theoretical analysis and experimental study on the generation of Laguerre Gaussian beam of vortex light wave using phase only LCOS-SLM. For measurement of phase distortion of SLM and phase recovery, a single interference pattern obtained by light wave interference method is used and accurate phase distortion can be obtained by a method called regularized phase tracker approach (RQPT) which is effective also for vortex or closed fringe. As a result, the phase distortion of the diffraction element was corrected. Numerical simulation and experimental results on the generation of Laguerre Gaussian beam by both binary and phase only modulation are discussed based on the angular spectrum method and the Fresnel transformation method in hologram (CGH) diffraction.