Holographic femtosecond laser processing using 6.3 kHz pulse-to-pulse spatial light modulation with binary phase masks

• DOI: 10.1016/j.optlastec.2024.111014
• Publication Date: 2024-04-17T22:58:35Z
• Authors: Satoshi Hasegawa; Kenta Nozaki; Ayano Tanabe; Nobuyuki Hashimoto; Yoshio Hayasaki
• Keywords: Spatial light modulator; Control reconfiguration; Modulation (music)

Femtosecond laser pulses were spatially modulated with fast reconfiguration of computer-generated holograms (CGHs) using a ferroelectric liquid-crystal-on-silicon spatial light modulator (FLCoS-SLM). Reconfiguration was executed at frame rate more than 1 kHz while changing the CGH every frame. The CGHs designed as binary phases because FLCoS-SLM can represent only values. optimization method modified by weighted iterative Fourier transform algorithm (IFTA) to make phase. fundamental performance reconstruction and femtosecond processing 6.3 pulse-to-pulse modulation demonstrated. speed will drastically change applicability science industrial fields open door for new applications.