Reconfigurable structured light generation in a multicore fibre amplifier

Di Lin (), Joel Carpenter, Yutong Feng, Saurabh Jain, Yongmin Jung, Yujun Feng, Michalis N. Zervas and David J. Richardson
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Di Lin: University of Southampton
Joel Carpenter: The University of Queensland
Yutong Feng: University of Southampton
Saurabh Jain: University of Southampton
Yongmin Jung: University of Southampton
Yujun Feng: University of Southampton
Michalis N. Zervas: University of Southampton
David J. Richardson: University of Southampton

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: 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.

Date: 2020
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DOI: 10.1038/s41467-020-17809-x

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