多芯光纤放大器中的可重构结构光生成

Reconfigurable structured light generation in a multicore fibre amplifier.

作者信息

Lin Di, Carpenter Joel, Feng Yutong, Jain Saurabh, Jung Yongmin, Feng Yujun, Zervas Michalis N, Richardson David J

机构信息

Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK.

School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia.

出版信息

Nat Commun. 2020 Aug 10;11(1):3986. doi: 10.1038/s41467-020-17809-x.

DOI:10.1038/s41467-020-17809-x

PMID:32778643

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7417554/

Abstract

Structured light, with spatially varying phase or polarization distributions, has given rise to many novel applications in fields ranging from optical communication to laser-based material processing. However the efficient and flexible generation of such beams from a compact laser source at practical output powers still remains a great challenge. Here we describe an approach capable of addressing this need based on the coherent combination of multiple tailored Gaussian beams emitted from a multicore fibre (MCF) amplifier. We report a proof-of-concept structured light generation experiment, using a cladding-pumped 7-core MCF amplifier as an integrated parallel amplifier array and a spatial light modulator (SLM) to actively control the amplitude, polarization and phase of the signal light input to each fibre core. We report the successful generation of various structured light beams including high-order linearly polarized spatial fibre modes, cylindrical vector (CV) beams and helical phase front optical vortex (OV) beams.

摘要

具有空间变化相位或偏振分布的结构光，已在从光通信到基于激光的材料加工等诸多领域催生了许多新颖应用。然而，在实际输出功率下从紧凑型激光源高效且灵活地产生此类光束，仍然是一项巨大挑战。在此，我们描述一种基于从多芯光纤（MCF）放大器发射的多个定制高斯光束的相干组合来满足这一需求的方法。我们报告了一个概念验证的结构光产生实验，使用包层泵浦的7芯MCF放大器作为集成并行放大器阵列，以及一个空间光调制器（SLM）来主动控制输入到每个光纤芯的信号光的幅度、偏振和相位。我们报告成功产生了各种结构光束，包括高阶线性偏振空间光纤模式、圆柱矢量（CV）光束和螺旋相位前沿光学涡旋（OV）光束。