G. C. Papen

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—Previous results suggest that the crosstalk produced by the fiber nonlinearity in a WDM system imposes a severe limit to the capacity of optical fiber channels, since the interference power increases faster than the signal power, thereby limiting the maximum achievable signal-to-interference-plus-noise ratio (SINR). We study this system in the weakly(More)
—The achievable information rates (AIRs) of a nonreturn-to-zero optical transmission system operating at 10 Gb/s are determined based on experimentally obtained conditional probability density functions for an amplified spontaneous emission noise-dominated system in the presence of chromatic dispersion (with and without optical dispersion compensation).(More)
—The most probable error events for a long-haul optical communication system using sequence estimation are characterized , and the performance using a modulation code is analyzed. The modulation code is restricted to be a constrained code that enhances the minimum distance between received signal sequences. We investigate several constrained codes used in(More)
The capacity region of wavelength division multiplexing in nonlinear fiber optic channels with coherent communication is studied. We show that by optimally using the information from all the channels at the receiver, the loss in the capacity due to the mixing of channels is negligible in the weakly nonlinear regime. On the other hand, with single-channel(More)
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