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Regenerative mode demultiplexer with application to MIMO-free MDM systems.

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Title: Regenerative mode demultiplexer with application to MIMO-free MDM systems.
Authors: Chen, Yanjun1 (AUTHOR), Wu, Baojian1 (AUTHOR) bjwu@uestc.edu.cn, Ma, Xinyu1 (AUTHOR), Wen, Feng1 (AUTHOR), Qiu, Kun1 (AUTHOR)
Source: Applied Physics B: Lasers & Optics. Dec2025, Vol. 131 Issue 12, p1-11. 11p.
Subjects: Semiconductor optical amplifiers, Multiplexing, Optical communications, Optical communications equipment, Quality factor, Coupled mode theory (Wave-motion)
Abstract: Mode division multiplexing (MDM) is capable of effectively enhancing the spectral efficiency of optical communication systems. However, practical mode demultiplexers inevitably introduce mode crosstalk and then result in the degradation of mode extinction ratio (MER). To improve the transmission performance of MDM systems, we propose an all-optical regeneration scheme using a nonlinear bidirectional semiconductor optical amplifier (SOA), and combine it with a passive mode demultiplexer (MDEMUX) to form the called regenerative MDEMUX. Simulations show that the regenerative MDEMUX has an MER improvement of about 6.5 dB for the LP01 and LP11 modes compared with the passive MDEMUX. To effectively suppress the co-frequency mode crosstalk, the regenerative MDEMUX can be applied to the MIMO-free MDM systems and the maximal Q-factor improvement of on–off keying (OOK) signals is up to 1.99 dB and 2.06 dB for the two modes, respectively. The dependencies of Q-factor improvement on mode crosstalk frequency spacing, bit rate, modal power, modulation format and ASE noise are also discussed. The proposed regeneration scheme is applied to the future MDM systems and all-optical switching nodes. [ABSTRACT FROM AUTHOR]
Copyright of Applied Physics B: Lasers & Optics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 190380765
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  Data: Regenerative mode demultiplexer with application to MIMO-free MDM systems.
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  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Yanjun%22">Chen, Yanjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Baojian%22">Wu, Baojian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bjwu@uestc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Ma%2C+Xinyu%22">Ma, Xinyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wen%2C+Feng%22">Wen, Feng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qiu%2C+Kun%22">Qiu, Kun</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Applied+Physics+B%3A+Lasers+%26+Optics%22">Applied Physics B: Lasers & Optics</searchLink>. Dec2025, Vol. 131 Issue 12, p1-11. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Semiconductor+optical+amplifiers%22">Semiconductor optical amplifiers</searchLink><br /><searchLink fieldCode="DE" term="%22Multiplexing%22">Multiplexing</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+communications%22">Optical communications</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+communications+equipment%22">Optical communications equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Quality+factor%22">Quality factor</searchLink><br /><searchLink fieldCode="DE" term="%22Coupled+mode+theory+%28Wave-motion%29%22">Coupled mode theory (Wave-motion)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Mode division multiplexing (MDM) is capable of effectively enhancing the spectral efficiency of optical communication systems. However, practical mode demultiplexers inevitably introduce mode crosstalk and then result in the degradation of mode extinction ratio (MER). To improve the transmission performance of MDM systems, we propose an all-optical regeneration scheme using a nonlinear bidirectional semiconductor optical amplifier (SOA), and combine it with a passive mode demultiplexer (MDEMUX) to form the called regenerative MDEMUX. Simulations show that the regenerative MDEMUX has an MER improvement of about 6.5 dB for the LP01 and LP11 modes compared with the passive MDEMUX. To effectively suppress the co-frequency mode crosstalk, the regenerative MDEMUX can be applied to the MIMO-free MDM systems and the maximal Q-factor improvement of on–off keying (OOK) signals is up to 1.99 dB and 2.06 dB for the two modes, respectively. The dependencies of Q-factor improvement on mode crosstalk frequency spacing, bit rate, modal power, modulation format and ASE noise are also discussed. The proposed regeneration scheme is applied to the future MDM systems and all-optical switching nodes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Applied Physics B: Lasers & Optics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00340-025-08589-7
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        Text: English
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        PageCount: 11
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      – SubjectFull: Multiplexing
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      – SubjectFull: Optical communications
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      – SubjectFull: Optical communications equipment
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      – SubjectFull: Quality factor
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      – SubjectFull: Coupled mode theory (Wave-motion)
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      – TitleFull: Regenerative mode demultiplexer with application to MIMO-free MDM systems.
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            NameFull: Chen, Yanjun
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            NameFull: Ma, Xinyu
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              M: 12
              Text: Dec2025
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              Y: 2025
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