期刊
PHYSICAL REVIEW APPLIED
卷 18, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.18.024018
关键词
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资金
- National Science Founda- tion (NSF) Graduate Research Fellowship [1745302]
- Air Force Office of Scientific Research (AFOSR) [FA9550-20-1-0113, FA9550-16-1-0391]
This paper highlights the importance of algorithmic stability in self-configuration and proposes a self-configuration scheme for both triangular and rectangular meshes.
Realistic multiport interferometers (beamsplitter meshes) are sensitive to component imperfections, and this sensitivity increases with size. Self-configuration techniques can be employed to correct these imperfections, but not all techniques are equal. This paper highlights the importance of algorithmic stability in self-configuration. Na??ve approaches based on sequentially setting matrix elements are unstable and perform poorly for large meshes, while techniques based on power ratios perform well in all cases, even in the presence of large errors. Based on this insight, we propose a self-configuration scheme for triangular meshes that requires only external detectors and works without prior knowledge of the component imperfections. This scheme extends to the rectangular mesh by adding a single array of detectors along the diagonal.
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