illuminating the lantern: 多模转换器的相干、光谱极化表征
摘要
虽然光子灯笼高效地且独特地将一组输入模式映射到单模式输出（或反之），但由于制造缺陷，任何具体制造设备的光学模式传递矩阵无法在设计阶段受到约束。 accurate knowledge of the mapping enables complex sensing or beam control applications that leverage multimode conversion. 在本工作中，我们 presented a characterisation system to directly measure the electric field from a photonic lantern using digital off-axis holography, following its evolution over a 73 nm range near 1550 nm and in two orthogonal, linear polarisations. 我们 provide the first multi-wavelength, polarisation decomposed characterisation of the principal modes of a photonic lantern. Performance of our testbed is validated on a single-mode fibre then harnessed to characterise a 19-port, multicore fibre fed photonic lantern. 我们 uncover the typical wavelength scale at which the modal mapping evolves and measure the relative dispersion in the device, finding significant differences with idealised simulations. In addition to detailing the system, we also share the empirical mode transfer matrices, enabling future work in astrophotonic design, computational imaging, device fabrication feedback loops and beam shaping.
引用
@article{arxiv.2510.25330,
title = {Illuminating the lantern: coherent, spectro-polarimetric characterisation of a multimode converter},
author = {Adam K. Taras and Barnaby R. M. Norris and Christopher Betters and Andrew Ross-Adams and Peter G. Tuthill and Jin Wei and Sergio Leon-Saval},
journal= {arXiv preprint arXiv:2510.25330},
year = {2026}
}
备注
14 pages, 6 figures plus supplementary document