Zero-order-free complex beam shaping

The unwanted zero-order diffraction is still an issue in beam shaping using pixelated spatial light modulators. In this paper, we report a new approach for free by designing asymmetric triangle reflector and introducing digital blazed grating lens to the phase hologram addressed onto modulator. By adding previously reported complex-amplitude coding algorithms, realized generation of complex beams without burden diffraction. We comparatively investigated produced fields modified algorithm validate proposed method.