Design and characteristics of square-assisted ring-core fiber for mode space degenerate modulating

Yujing Song; Jingjing Zheng; Li Pei; Jing Huang; Tigang Ning; Jing Li; Jianshuai Wang; Bing Bai

doi:10.1117/12.2654860

15 December 2022 Design and characteristics of square-assisted ring-core fiber for mode space degenerate modulating

Yujing Song, Jingjing Zheng, Li Pei, Jing Huang, Tigang Ning, Jing Li, Jianshuai Wang, Bing Bai

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124783R (2022) https://doi.org/10.1117/12.2654860
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

A novel square-assisted ring-core fiber characterized by a square region of low refractive index in the core was proposed. This fiber structure allows for spatial mode modulation. When the subscript m of the LPmn modes supported by the fiber is an even number, the spatial modes of the LPmn modes are degenerately separated. This fiber supports 15 modes over the entire C-band. The effective refractive index difference (Δneff) between spatial modes at 1550nm is greater than 1.18×10^-4. At the same time, the Δneff between all adjacent modes is in the range of (1.13~13.52)×10^-4. The polarization separation level of each mode is below 7.12×10^-6, which is two orders of magnitude lower than the level of degenerate separation of spatial modes. Numerical simulations show that the dispersion values range from -16 ps/nm/km to 15 ps/nm/km for 15 modes over the entire C-band. This fiber has a good tolerance for process error, the optical fiber processing requirements can be met by using the existing optical fiber preparation technology.

Citation Download Citation

Yujing Song, Jingjing Zheng, Li Pei, Jing Huang, Tigang Ning, Jing Li, Jianshuai Wang, and Bing Bai "Design and characteristics of square-assisted ring-core fiber for mode space degenerate modulating", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124783R (15 December 2022); https://doi.org/10.1117/12.2654860

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KEYWORDS

Structured optical fibers

Polarization

Modulation

Refractive index

Cladding

Optical fibers

Fiber characterization

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