3D-printed terahertz subwavelength dual-core fibers with dense channel-integration
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929463483170816 |
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| author | Ge, Haiyuan Li, Haisu Jie, Lu Wang, Jianshuai Cao, Yang Atakaramians, Shaghik Gong, Yandong Ren, Guobin Pei, Li |
| author_facet | Ge, Haiyuan Li, Haisu Jie, Lu Wang, Jianshuai Cao, Yang Atakaramians, Shaghik Gong, Yandong Ren, Guobin Pei, Li |
| contents | Terahertz (THz) fiber that provides high-speed connections is an essential component in THz communication systems. The emerging space-division-multiplexing technology is expected to increase the transmission capacity of THz communications. A promising candidate to achieve that is integrating multiple channels in a compact THz multi-core fiber system. Here, we propose and experimentally demonstrate a THz subwavelength rectangular dielectric dual-core fiber structure, where two identical cores can be densely integrated, thanks to the polarization-maintaining feature of the rectangular fiber. Different configurations, including the placements, core-spacings, and polarization states of two fiber cores, are comprehensively investigated to improve channel isolation. Numerical simulations show that the fractional power in core of fiber mode has a dominant effect on inter-core coupling performance. Moreover, we design the core size (1 mm x 0.5 mm) slightly less than the WR5.1 waveguide (1.295 mm x 0.6475 mm) so that the fiber can be conveniently connected with the WR5.1 flange port with mode excitation efficiencies up to 62.8%. A cost-efficient dielectric 3D printing technique is employed for rapid fabrications of dual-core fibers and corresponding polymer flange structures that offer solid integration between the fiber samples and the WR5.1 port. Experimental measurements demonstrate that a 4-mm core-spacing (less than three times the operation wavelengths over 0.17-0.21 THz) supports robust dual-channel propagation with channel isolation values more than 15 dB, which are consistent with theoretical and numerical results. This work provides a densely integrated dual-core fiber system with low fabrication cost and practical connection to the WR5.1 flange, holding exciting potential for high-capacity THz space-division-multiplexing communication systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09664 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 3D-printed terahertz subwavelength dual-core fibers with dense channel-integration Ge, Haiyuan Li, Haisu Jie, Lu Wang, Jianshuai Cao, Yang Atakaramians, Shaghik Gong, Yandong Ren, Guobin Pei, Li Optics Terahertz (THz) fiber that provides high-speed connections is an essential component in THz communication systems. The emerging space-division-multiplexing technology is expected to increase the transmission capacity of THz communications. A promising candidate to achieve that is integrating multiple channels in a compact THz multi-core fiber system. Here, we propose and experimentally demonstrate a THz subwavelength rectangular dielectric dual-core fiber structure, where two identical cores can be densely integrated, thanks to the polarization-maintaining feature of the rectangular fiber. Different configurations, including the placements, core-spacings, and polarization states of two fiber cores, are comprehensively investigated to improve channel isolation. Numerical simulations show that the fractional power in core of fiber mode has a dominant effect on inter-core coupling performance. Moreover, we design the core size (1 mm x 0.5 mm) slightly less than the WR5.1 waveguide (1.295 mm x 0.6475 mm) so that the fiber can be conveniently connected with the WR5.1 flange port with mode excitation efficiencies up to 62.8%. A cost-efficient dielectric 3D printing technique is employed for rapid fabrications of dual-core fibers and corresponding polymer flange structures that offer solid integration between the fiber samples and the WR5.1 port. Experimental measurements demonstrate that a 4-mm core-spacing (less than three times the operation wavelengths over 0.17-0.21 THz) supports robust dual-channel propagation with channel isolation values more than 15 dB, which are consistent with theoretical and numerical results. This work provides a densely integrated dual-core fiber system with low fabrication cost and practical connection to the WR5.1 flange, holding exciting potential for high-capacity THz space-division-multiplexing communication systems. |
| title | 3D-printed terahertz subwavelength dual-core fibers with dense channel-integration |
| topic | Optics |
| url | https://arxiv.org/abs/2408.09664 |