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Spatial mode exchange technique using volume holograms with a random optical diffuser for reduction of crosstalk

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Abstract

In mode-division multiplexing systems, the transmission quality is restricted by the differential mode delay (DMD). We previously proposed a spatial mode exchange technique using volume holograms (VHET) to reduce the DMD. VHET can be used for the exchange of multiple spatial modes with different transmission speeds using a single device. However, in VHET, incidents of cross-talk (XT) caused by non-target holograms severely degrade the exchange performance. To address this issue, we propose a spatial mode exchange technique that uses volume holograms in combination with a random optical diffuser. By scattering the intensity distribution of the signal beam uniformly using a random optical diffuser, high exchange performance can be attained due to the reduction in the influence of non-targeted holograms. We confirmed the basic operation of the proposed scheme by considering the crosstalk component coupled to the few-mode fiber in a mode-division multiplexing system. The simulation results show that the maximum XTs are significantly suppressed to − 15.8 dB.

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Acknowledgements

This work was supported by JSPS KAKENHI (Grant Number JP19K04366).

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Authors and Affiliations

  1. Graduate School of Information Science and Technology, Hokkaido University, Sapporo, 060-0814, Japan

    Shuanglu Zhang, Atsushi Okamoto, Taijun Shiba, Hotaka Hayashi, Kazuhisa Ogawa & Akihisa Tomita

  2. OPTOQUEST Co., Ltd., Ageo, Saitama, 362-0021, Japan

    Taketoshi Takahata

  3. National Institute of Information and Communications Technology (NICT), Koganei, Tokyo, 184-8795, Japan

    Satoshi Shinada, Yuta Goto & Naoya Wada

  4. OPTOQUEST Advanced Optical Device Development Research Division, Hokkaido University, Sapporo, 001-0021, Japan

    Atsushi Okamoto & Taketoshi Takahata

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  1. Shuanglu Zhang
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  2. Atsushi Okamoto
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  3. Taijun Shiba
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  4. Hotaka Hayashi
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  5. Kazuhisa Ogawa
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  6. Akihisa Tomita
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  7. Taketoshi Takahata
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  8. Satoshi Shinada
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  9. Yuta Goto
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  10. Naoya Wada
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Correspondence to Shuanglu Zhang.

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Zhang, S., Okamoto, A., Shiba, T. et al. Spatial mode exchange technique using volume holograms with a random optical diffuser for reduction of crosstalk. Opt Rev 28, 181–189 (2021). https://doi.org/10.1007/s10043-021-00648-6

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  • DOI: https://doi.org/10.1007/s10043-021-00648-6

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