Demultiplexing by independent component analysis in coherent optical transmission: The polarization channel alignment problem

Nabavi, Neda; Hall, Trevor J.

doi:10.1109/pn.2015.7292462

Cited by 2 publications

(2 citation statements)

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“…The use of the PC was required to avoid the use of polarization tracking algorithms for the NFT signals, which were not available at the time of the experiment. In the future it could be possible to use modulation independent polarization tracking algorithms, as an example using independent components analysis [43]. The signal is then detected by using a standard coherent receiver (33 GHz analog bandwidth, 80 GSa/s), in a homodyne configuration where the transmitter laser is used as LO.…”

Section: B Experimental Setupmentioning

confidence: 99%

Dual-polarization nonlinear Fourier transform-based optical communication system

Gaiarin¹,

Perego²,

Silva³

et al. 2018

Optica

135

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New services and applications are causing an exponential increase in internet traffic. In a few years, current fiber optic communication system infrastructure will not be able to meet this demand because fiber nonlinearity dramatically limits the information transmission rate. Eigenvalue communication could potentially overcome these limitations. It relies on a mathematical technique called "nonlinear Fourier transform (NFT)" to exploit the "hidden" linearity of the nonlinear Schrödinger equation as the master model for signal propagation in an optical fiber. We present here the theoretical tools describing the NFT for the Manakov system and report on experimental transmission results for dual polarization in fiber optic eigenvalue communications. A transmission of up to 373.5 km with bit error rate less than the hard-decision forward error correction threshold has been achieved. Our results demonstrate that dual-polarization NFT can work in practice and enable an increased spectral efficiency in NFT-based communication systems, which are currently based on single polarization channels. OCIS codes:

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Section: B Experimental Setupmentioning

confidence: 99%

Dual-polarization nonlinear Fourier transform-based optical communication system

Gaiarin¹,

Perego²,

Silva³

et al. 2018

Optica

135

View full text Add to dashboard Cite

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“…However, these blind algorithms have low convergence speed, singularity problem, and step-length sensitivity [5] due to the intrinsic shortcoming of such modulus-based cost functions. Besides, the independent component algorithm (ICA) is also effective for blind source separation [6,7] , which solves the singularity [8] but has the inherent polarization alignment problem [9] . The singularity problem can be solved by Stokes space estimation or as the initialization of the elements in the Jones matrix for the CMAbased blind equalizations.…”

Section: Introductionmentioning

confidence: 99%

Impacts of the measurement equation modification of the adaptive Kalman filter on joint polarization and laser phase noise tracking

Zhang

et al. 2022

中国光学快报

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Kalman filtering (KF) has good potential in fast rotation of state of polarization (RSOP) tracking. Different measurement equations cause the diverse RSOP tracking performances. We compare the conventional KF (CKF) and the modified KF (MKF), which have different measurement equations. Semi-theoretical analysis indicates the lower conditional variances of measurement residuals and process noise of MKF. Compared with CKF, the MKF has > 3 dB optical signal-to-noise ratio (OSNR) improvement at the 10 MHz scrambling rate in simulation. For MKF, more significant tracking speed improvement exists for lower OSNR. MKF can be smoothly combined with an adaptive algorithm, which outperforms adaptive CKF throughout the simulations.

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Demultiplexing by independent component analysis in coherent optical transmission: The polarization channel alignment problem

Cited by 2 publications

References 0 publications

Dual-polarization nonlinear Fourier transform-based optical communication system

Dual-polarization nonlinear Fourier transform-based optical communication system

Impacts of the measurement equation modification of the adaptive Kalman filter on joint polarization and laser phase noise tracking

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