Hole-Assisted Graded-Index Four-LP-Mode Fiber With Low Differential Mode Group Delay Over C+L Band
In this paper, in order to achieve low differential mode group delay (DMGD) over the C+L band, we propose the hole-assisted graded-index few mode fiber (FMF) design supporting four nondegenerated linear polarized (LP) modes for a mode division multiplexing system. In order to determine th...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7586036/ |
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| Summary: | In this paper, in order to achieve low differential mode group delay (DMGD) over the C+L band, we propose the hole-assisted graded-index few mode fiber (FMF) design supporting four nondegenerated linear polarized (LP) modes for a mode division multiplexing system. In order to determine the fiber core parameters, an optimization has been made between the enlargement of the effective area <inline-formula><tex-math notation="LaTeX">$({{A_{eff}}})$</tex-math> </inline-formula> and the reduction of macrobending loss (MBL). The <inline-formula><tex-math notation="LaTeX"> ${A_{eff}}$</tex-math></inline-formula> about 107 <inline-formula><tex-math notation="LaTeX">$\mu {m^2}$</tex-math> </inline-formula> for LP<sub>01</sub> mode at the wavelength of 1550 nm and the MBL lower than 0.005 dB/100 turns for LP<sub>02</sub> mode at the curvature radius of 30 mm and at the wavelength of 1550 nm are achieved simultaneously. The numerical simulation results prove that the hole-assisted structure can greatly reduce the absolute value of DMGD of the FMF. Particularly, the maximum DMGD less than |35| ps/km within the spectrum range from 1530 to 1630 nm is achieved. A tolerance analysis against manufacturing errors has been discussed, and we further propose a self-managed low DMGD transmission line solution with the controllable air-hole size. |
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| ISSN: | 1943-0655 |