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Polarization and wavelength routers based on difractive neural network

Frontiers of Optoelectronics 2024年第3期17卷 17-28页

作者： Xiaohong Lin Yulan Fu Kuo Zhang Xinping Zhang Shuai Feng Xiaoyong Hu School of Physics and Optoelectronic Engineering Beijing University of TechnologyBeijing 100124China School of Science Minzu University of ChinaBeijing 100081China State Key Laboratory for Mesoscopic Physics and Department of Physics Collaborative Innovation Center of Quantum MatterBeijing Academy of Quantum Information SciencesNano-Optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

In the feld of information processing,all-optical routers are signifcant for achieving high-speed,high-capacity signal processing and *** this study,we developed three types of structurally simple and fexible routers using the deep difractive neural network(D2 NN),capable of routing incident light based on wavelength and ***,we implemented a polarization router for routing two orthogonally polarized light *** second type is the wavelength router that can route light with wavelengths of 1550,1300,and 1100 nm,demonstrating outstanding performance with insertion loss as low as 0.013 dB and an extinction ratio of up to 18.96 dB,while also maintaining excellent polarization *** fnal router is the polarization-wavelength composite router,capable of routing six types of input light formed by pairwise combinations of three wavelengths(1550,1300,and 1100 nm)and two orthogonal linearly polarized lights,thereby enhancing the information processing capability of the *** devices feature compact structures,maintaining high contrast while exhibiting low loss and passive characteristics,making them suitable for integration into future optical *** study introduces new avenues and methodologies to enhance performance and broaden the applications of future optical information processing systems.

关键词： optical difractive neural network all-optical routers Polarization degree of freedom Wavelength degree of freedom

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