Rotational scanning and multiple-spot focusing through a multimode fiber based on digital optical phase conjugation

Chaojie Ma, Jianglei Di, Ying Li, Fajun Xiao, Jiwei Zhang, Kaihui Liu, Xuedong Bai, Jianlin Zhao

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We demonstrate, for the first time, the rotational memory effect of a multimode fiber (MMF) based on digital optical phase conjugation (DOPC) to achieve multiple-spot focusing. An implementation interferometer is used to address the challenging alignments in DOPC. By rotating the acquired phase conjugate pattern, rotational scanning through a MMF could be achieved by recording a single off-axis hologram. The generation of two focal spots through a MMF is also demonstrated by combining the rotational memory effect with the superposition principle. The results may be useful for ultrafast scanning imaging and optical manipulation of multiple objects through a MMF.

Original languageEnglish
Article number062501
JournalApplied Physics Express
Volume11
Issue number6
DOIs
StatePublished - Jun 2018

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