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Dual-modulation of micro-photoluminescence in rare-earth-doped crystals by femtosecond laser irradiation for 5D optical data storage

Yingying Ren,Yu Li, Kaishun Guo,Zemeng Cui,Chao Wang,Yuanxin Tan,Hongliang Liu,Yangjian Cai

Optics and Lasers in Engineering（2023）

Cited 3|Views17
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Abstract
•Micro-structures are fabricated in Pr:YLF crystals by femtosecond laser irradiation.•Dual-modulation of micro-photoluminescence is found within broad parameter windows.•Optical data are encrypted in the crystal with intensity and wavelength multiplexing.•Erasure energy threshold is demonstrated with secondary femtosecond laser irradiation.•Spatially-selective rewriting and erasure of encrypted information are realized.
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Key words
Optical data storage,Femtosecond laser irradiation,Rare-earth-doped material,Dual modulation of micro-photoluminescence,Multiplexing,Information rewriting/erasure
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