Analysis of Incoherent Homodyne Crosstalk in Optical Networks

Abstract

We present an analytical method for calculating bit-error rates and power penalties due to two incoherent homodyne (in-band) crosstalk sources interfering with an optical signal. The power penalties predicted by this analysis are in excellent agreement with results from numerical simulations. We also examine the conditions under which a second crosstalk source causes a significant increase in power penalty over a single crosstalk source. We find that the additional degradation due to the second crosstalk source is negligible if it has a power level that is more than 30 dB smaller than the first.

Performance analysis of interferometric noise due to unequally powered interferers in optical networks

“…However, in order to simplify the analysis and/or the experimental setup, virtually all of these investigations applied to date have considered the presence of equally powered interferers at the receiver. Both [3] and [9] have considered the effects of unequally powered interferers but only in very limited cases-where one interferer is of constant power and another (or set of others) is of varying power. A more realistic model of the actual interferer power distribution at the receiver in a deployed optical network is likely to be described by the presence of a set of interferers all of differing power at the receiver.…”