使用异构光子灯笼的全光纤宽带波分复用
All-Fiber Broadband Wavelength-Division Multiplexing using Heterogeneous Photonic Lanterns
- Leibniz-Institut für Astrophysik Potsdam (AIP)（波茨坦阿斯特拉物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出基于1x7异构光子灯笼的全光纤宽带波分复用架构，通过无约束组合不同单模纤芯实现无源波长选择性路由，在可见光与H波段展现双区性能，适用于下一代多波长天文光谱仪。
AI中文摘要：
本工作提出了一种使用1x7异构光子灯笼（PLs）的全光纤宽带波分复用架构，具体为PL-(6+1)和PL-(4+3)。通过在不施加刚性几何约束的情况下组合不匹配的单模纤芯，即SM450和SMF28，这些器件打破了系统简并性，实现了无源的、波长选择性的空间路由。实验表征揭示了在宽光谱范围内明显的双区性能。在可见光波段（350-740 nm），这些器件作为多通道宽带收集器，有效地引导光穿过所有通道而不进行空间分离。相反，在H波段（1520-1610 nm），纤芯不对称性消除了模式简并并最大化传播常数（beta）匹配条件，从而实现了无源光谱分选。这些结果证实，无约束、自由封装的异构光纤束能够满足绝热过渡准则，展示了它们在未来天文设施中的潜力，这些设施需要同时具备多波长能力，以馈送独立的、针对波段优化的光谱仪。
英文摘要：
This work presents an all-fiber broadband wavelength-division multiplexing architecture using 1x7 heterogeneous photonic lanterns (PLs), specifically PL-(6+1) and PL-(4+3). By combining mismatched single-mode cores, namely SM450 and SMF28, without rigid geometric constraints, these devices break system degeneracy and enable passive, wavelength-selective spatial routing. Experimental characterization reveals distinct dual-regime performance across a wide spectral range. In the visible band (350-740 nm), the devices function as multi-channel broadband collectors, effectively guiding light across all channels without spatial separation. Conversely, in the H-band (1520-1610 nm), core asymmetries lift mode degeneracy and maximize propagation constant (beta) matching conditions, thereby enabling passive spectral sorting. These results confirm that unconstrained, free-packaged heterogeneous fiber bundles can meet adiabatic transition criteria, showcasing their potential for next-generation astronomical facilities that require simultaneous multi-wavelength capabilities to feed separate, band-optimized spectrographs.
