Experimental demonstration of modified constant modulus algorithm with polarization demultiplexing in Stokes space in optical coherent receiver

Constant modulus algorithm (CMA) is widely applied for polarization demultiplexing in coherent optical communication system. However, the singular value problem always plagues CMA. Modified CMA based on polarization demultiplexing in Stokes space (SS-PDM) was proposed to avoid the singular value pro...

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Vydáno v:Optics communications Ročník 583; s. 131763
Hlavní autoři: Huang, Bohang, Dong, Xiangyong, Shi, Fengjie, Yu, Zhenming, Xu, Kun
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.06.2025
Témata:
Coherent detection
Constant modulus algorithm
Polarization demultiplexing
Polarization-dependent loss
Stokes space
Stokes space
Polarization demultiplexing
Coherent detection
Polarization-dependent loss
Constant modulus algorithm
ISSN:0030-4018
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Shrnutí:Constant modulus algorithm (CMA) is widely applied for polarization demultiplexing in coherent optical communication system. However, the singular value problem always plagues CMA. Modified CMA based on polarization demultiplexing in Stokes space (SS-PDM) was proposed to avoid the singular value problem in simulation. Here we firstly experimentally demonstrate the modified CMA based on SS-PDM in optical coherent receivers. We conduct experiment of 40-Gbit/s polarization multiplexing (PDM) QPSK to verify this method. The experimental results show that the singularity problem of CMA disappears for Polarization-dependent loss (PDL) of 2.7 dB and 4.8 dB by using the modified CMA and the convergence speed of the modified CMA increases significantly compared with that of conventional CMA.
ISSN:0030-4018
DOI:10.1016/j.optcom.2025.131763