Abstract
Compared with the fundamental mode in the optical fibers, the higher-order modes with unique dispersion characteristics give the radiation generated by nonlinearity a wider bandwidth. On this basis, a design scheme of single-mode operation in a few-mode optical fiber is proposed. All the core modes except the LP02 mode will be filtered out by introducing two microstructure cladding regions that are strongly coupled to the core modes with different refractive indexes. The simulation results show that the loss of the LP02 mode is less than 0.1 dB/m in the bandwidth greater than 20 nm, while the losses of other modes are greater than 10 dB/m, indicating that the fiber achieves effective transmission of a single high-order mode. This work broadens the concept of selective mode filtering design and may attract more researchers’ attention to single high-order mode fiber applications.
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Acknowledgements
This work is supported by a grant (BK20170559) from the Natural Science Foundation of Jiangsu Province, China and grant (No.CE20215046) from Changzhou Science & Technology program.
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Mingyang Chen developed the original concept and theoretical description. All authors contributed to the writing of the manuscriptand supervised the project. Susu Hu analysed the data and coordinated the manuscript preparation.
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Hu, S., Chen, M., Yang, L. et al. Effectively single high-order mode guidance based on selective mode filtering. Eur. Phys. J. D 76, 57 (2022). https://doi.org/10.1140/epjd/s10053-022-00381-y
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DOI: https://doi.org/10.1140/epjd/s10053-022-00381-y