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- Cen Xia, Naresh Chand, +9 authors Guifang Li
- Optics express
- 2015

We demonstrate the first few-mode-fiber based passive optical network, effectively utilizing mode multiplexing to eliminate combining loss for upstream traffic. Error-free performance has beenâ€¦ (More)

- Ruilong Mi, Ningbo Zhao, Zhiqun Yang, Lin Zhang, Guifang Li
- 2017 Optical Fiber Communications Conference andâ€¦
- 2017

A microwave-photonic technique for measuring dispersion characteristics of few-mode fibers is proposed and experimentally demonstrated. This technique allows simultaneous high-precision measurementâ€¦ (More)

- Zhiqun Yang, Jian Wei Zhao, Neng Bai, Ezra Ip, Ting Wang, Guifang Li
- 2015 European Conference on Optical Communicationâ€¦
- 2015

We demonstrate experimentally adaptive recursive-least-square frequency-domain equalization (RLS-FDE) for mode-division-multiplexing. The RLS-FDE algorithm improves convergence speed as transmissionâ€¦ (More)

- Zhen Yi Wang, Hao Wu, +6 authors Guifang Li
- 2016 Optical Fiber Communications Conference andâ€¦
- 2016

We measure inter-modal Rayleigh backscattering in few-mode optical fibers and compare the experimental results with simulation results obtained from newly-developed analytical formulae. Excellentâ€¦ (More)

- Wei Wang, Jian Wei Zhao, +4 authors Ruilong Mi
- IEEE Photonics Technology Letters
- 2017

A theoretical model of noiseâ€”amplified spontaneous emission and Rayleigh backscatteringâ€”in few-mode fiber Raman amplifiers is presented in this letter. Based on this model, the equalization of theâ€¦ (More)

- Wei Wang, Jian Wei Zhao, +5 authors Guifang Li
- IEEE Photonics Technology Letters
- 2018

<inline-formula> <tex-math notation="LaTeX">$6\times 10$ </tex-math></inline-formula> Gb/s polarization- and mode-multiplexed transmission, without MIMO equalization, is experimentally demonstratedâ€¦ (More)

- Yaping Liu, Zhiqun Yang, Jian Zhao, Lin Zhang, Zhihong Li, Guifang Li
- Optics express
- 2018

We summarize theoretical formulae for determining the intrinsic loss of few-mode fibers and compare intrinsic losses among step-index and parabolic graded-index few-mode fibers (FMF) with differentâ€¦ (More)

- Zhiqun Yang, Jian Zhao, +4 authors Guifang Li
- Optics express
- 2018

We experimentally demonstrate adaptive variable-forgetting-factor (VFF) recursive-least-square frequency-domain equalization (RLS-FDE) for mode-division multiplexing. The VFF-RLS-FDE algorithmâ€¦ (More)

- Chao Li, Jian Wei Zhao, +4 authors Guifang Li
- 2017 Conference on Lasers and Electro-Opticsâ€¦
- 2017

We experimentally demonstrate 4Ã—100-Gb/s PM-QPSK transmission with a 50-GHz channel spacing and a span length greater than 250 km over a record reach of 2800 km. The transmission system uses aâ€¦ (More)

- Wei Wang, Jian Wei Zhao, +7 authors Guifang Li
- IEEE Photonics Technology Letters
- 2017

The <inline-formula> <tex-math notation="LaTeX">$4\mathrm {\mathbf {\times }}10$ </tex-math></inline-formula>-Gb/s polarization- and mode group-multiplexed transmission withoutâ€¦ (More)