The rapid development of technologies such as the internet, mobile communications, and artificial intelligence has dramatically increased the demand for high-capacity communication systems.
Advanced orbital angular momentum mode switching in multimode fiber utilizing an optical neural network chipWorking principle of the optical neural network chip for OAM mode switching. Credit: Zhengsen Ruan et al.
Among various solutions, mode-division multiplexing has emerged as a crucial technique, utilizing spatial modes like orbital angular momentum to enhance communication capacity. In a recent study, a team of scientists led by Professor Jian Wang from Huazhong University of Science and Technology introduced a flexible mode-switching system based on an optical neural network chip. This system is capable of switching between different OAM modes in a multimode fiber, a critical function for modern optical communication networks. The optical neural network chip provides the necessary flexibility, enabling arbitrary mode switching among the three OAM modes within the fiber.
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