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Journals and Conferences
The performance of different electronic equalization and processing schemes for 40- and 10-Gb/s optical transmission over single-mode fiber (SMF) are discussed, from the point of their ability to compensate chromatic dispersion (CD) and polarization mode dispersion (PMD). In addition, the impact of fiber nonlinearity and modulation format on equalization is… (More)
This paper investigates the performance of iterative (turbo) equalization to mitigate the effects of a polarization-mode dispersion (PMD) in nonreturn-to-zero (NRZ) intensity-modulated optical-fiber transmission systems. A PMD can lead to severe distortions in the received electrical signal and is a key limiter for the development of high-bit-rate… (More)
A theoretical approach is proposed that allows one to quantify the impact of fiber polarization mode dispersion (PMD) on optical binary transmission taking into account not only first-order polarization mode dispersion, but also signal distortion induced by second-order PMD. Using this approach the impact of the spectral signal width on PMD-induced system… (More)
A polarization-mode dispersion (PMD) transient recorder setup was realized enabling for the first time to our knowledge the monitoring of fast PMD fluctuation with a bandwidth of up to 1 MHz. Thirty-six hours of observation of an installed field fiber exhibits significant PMD variation within 10 ms.
In a comparative study post-detection signal processing performed by transversal-filter, decision-feedback-equalizer, the concatenation of both, or maximum-likelihood sequence detection is analyzed for PMD penalty reduction. Optical noise sources and second-order PMD are taken into account.
A new polarization constellation diagram leads to polarization QAM modulation formats. At 28 Gband (112 Gb/s) POL-QAM 6-4 with six QPSK modulated states-of-polarization enables 1.7-dB higher sensitivity than PDM-QPSK by applying coded-modulation with an inner RS(511,455) FEC.
Viterbi equalization in bandwidth limited receivers requires correlation sensitive algorithms more than increased state algorithms. The application of both enables equalization at 10 Gb/s with 1 dB add on penalty, if a 2.5 Gb/s receiver is applied.
In a new transmission format the output of a 10 Gb/s convolutional FEC encoder is directly mapped on an optical 10 Gbaud DQPSK signal. Versus 10 Gb/s DPSK, 4.5 dB OSNR gain is predicted without any increase of bandwidth.
A theory for the outages probability of PMD mitigation by fast scrambling has been evaluated. For 42.7 Gbit/s NRZ-ASK the PMD tolerance can be extended with 1e-5 outage from 3.8 to 5.6ps by 5 scramblers.
A new theoretical model exhibits that first-order polarization-mode dispersion (PMD) compensation extends the maximum acceptable PMD to 0.35 times the bit period T. At 10 gbit/s chromatic dispersion of 850 ps/nm (50 km SMF) reduces this PMD limit to 0.29 T.