Generation and application of structured beams based on double-phase holograms [Invited]
The manipulation of structured light beams requires simultaneous spatial modulation of amplitude and phase. Based on the double-phase holography (DPH) algorithm, we demonstrate an efficient reconstruction of Bessel beams with arbitrary on-axis intensity. Also, the off-axis DPH method enables more than doubled laser energy utilization compared with the widely-used off-axis phase wrapping modulation method. The DPH algorithm is also used in two-photon polymerization to enable the rapid fabrication of microtube arrays, ortho-hexagonal scaffolds, and 2D patterned microstructures. This work gives experimental proof to show the powerful feasibility of the DPH method in constructing economic adaptive laser processing systems.
Erse Jia, Chen Xie, Yue Yang, Minglie Hu. Generation and application of structured beams based on double-phase holograms [Invited][J]. Chinese Optics Letters, 2023, 21(11): 110002.