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Enhanced Atmospheric Turbulence Resiliency with Successive Interference Cancellation DSP in Mode Division Multiplexing Free-Space Optical Links

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Title: Enhanced Atmospheric Turbulence Resiliency with Successive Interference Cancellation DSP in Mode Division Multiplexing Free-Space Optical Links
Authors: Li, Yiming, Chen, Zhaozhong, Hu, Zhouyi, Benton, David M., Ali, Abdallah A. I., Patel, Mohammed, Lavery, Martin P. J., Ellis, Andrew D.
Publication Year: 2022
Collection: Physics (Other)
Subject Terms: Electrical Engineering and Systems Science - Signal Processing, Physics - Optics
More Details: We experimentally demonstrate the enhanced atmospheric turbulence resiliency in a 137.8 Gbit/s/mode mode-division multiplexing free-space optical communication link through the application of a successive interference cancellation digital signal processing algorithm. The turbulence resiliency is further enhanced through redundant receive channels in the mode-division multiplexing link. The proof of concept demonstration is performed using commercially available mode-selective photonic lanterns, a commercial transponder, and a spatial light modulator based turbulence emulator. In this link, 5 spatial modes with each mode carrying 34.46 GBaud dual-polarization quadrature phase shift keying signals are successfully transmitted with an average bit error rate lower than the hard-decision forward error correction limit. As a result, we achieved a record-high mode- and polarization-division multiplexing channel number of 10, a record-high line rate of 689.23 Gbit/s, and a record-high net spectral efficiency of 13.9 bit/s/Hz in emulated turbulent links in a mode-division multiplexing free-space optical system.
Document Type: Working Paper
DOI: 10.1109/JLT.2022.3209092
Access URL: http://arxiv.org/abs/2208.00836
Accession Number: edsarx.2208.00836
Database: arXiv
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  Data: Enhanced Atmospheric Turbulence Resiliency with Successive Interference Cancellation DSP in Mode Division Multiplexing Free-Space Optical Links
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Yiming%22">Li, Yiming</searchLink><br /><searchLink fieldCode="AR" term="%22Chen%2C+Zhaozhong%22">Chen, Zhaozhong</searchLink><br /><searchLink fieldCode="AR" term="%22Hu%2C+Zhouyi%22">Hu, Zhouyi</searchLink><br /><searchLink fieldCode="AR" term="%22Benton%2C+David+M%2E%22">Benton, David M.</searchLink><br /><searchLink fieldCode="AR" term="%22Ali%2C+Abdallah+A%2E+I%2E%22">Ali, Abdallah A. I.</searchLink><br /><searchLink fieldCode="AR" term="%22Patel%2C+Mohammed%22">Patel, Mohammed</searchLink><br /><searchLink fieldCode="AR" term="%22Lavery%2C+Martin+P%2E+J%2E%22">Lavery, Martin P. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Ellis%2C+Andrew+D%2E%22">Ellis, Andrew D.</searchLink>
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  Data: We experimentally demonstrate the enhanced atmospheric turbulence resiliency in a 137.8 Gbit/s/mode mode-division multiplexing free-space optical communication link through the application of a successive interference cancellation digital signal processing algorithm. The turbulence resiliency is further enhanced through redundant receive channels in the mode-division multiplexing link. The proof of concept demonstration is performed using commercially available mode-selective photonic lanterns, a commercial transponder, and a spatial light modulator based turbulence emulator. In this link, 5 spatial modes with each mode carrying 34.46 GBaud dual-polarization quadrature phase shift keying signals are successfully transmitted with an average bit error rate lower than the hard-decision forward error correction limit. As a result, we achieved a record-high mode- and polarization-division multiplexing channel number of 10, a record-high line rate of 689.23 Gbit/s, and a record-high net spectral efficiency of 13.9 bit/s/Hz in emulated turbulent links in a mode-division multiplexing free-space optical system.
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