IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Polarization crosstalk canceller for forward-pumping distributed Raman amplification
Akihide Sano
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2020 Volume 9 Issue 7 Pages 288-293


This paper proposes a novel polarization crosstalk canceller (PCC) based on receiver digital signal processing (DSP) in polarization division multiplexed digital coherent transmission utilizing forward-pumping distributed Raman amplification (DRA). The PCC consists of 1-tap adaptive filters with a butterfly configuration controlled by the recursive least square algorithm. The PCC offsets the crosstalk between two polarization tributaries caused by the time-varying polarization fluctuation due to the relative intensity noise of the forward-pumping sources. The proposed PCC is applied to the long-haul dual-polarization QPSK transmission experiment with forward-pumping DRA, and confirmed to improve the transmission performance.

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© 2020 The Institute of Electronics, Information and Communication Engineers
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