Yajun Jiang

Dec 9, 2024 | mdpi.com | Yajun Jiang |Wei Wu |Yu Guo |Huiling Zhou

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Nov 8, 2024 | mdpi.com | Huiling Zhou |Yu Guo |Yajun Jiang |Ke Wu

1. IntroductionEthnic villages are an important part of China’s rural system, and their unique ethnic characteristics and historical deposits provide unique resources for the development of tourism []. Along with the development of tourism, farmers in ethnic villages have shifted from traditional agricultural livelihoods to new livelihoods, such as tourism, and the traditional single agricultural livelihood has shifted to diversification [].

Jul 8, 2024 | opg.optica.org | Yajun Jiang |Li Shen |Jiaxin Gao |Yuhui Su

The inscription of a helical-sampled fiber Bragg grating (HSFBG) in a ring core fiber (RCF) using a low repetition rate femtosecond laser point-by-point technique is demonstrated. The reflection spectrum exhibits several peak groups attributed to the helical-sampled structure, with the wavelength interval between different groups determined by the helical pitch. Meanwhile, the number and spacing of the peaks within each group are dictated by the RCF.