638,429 research outputs found
Phase Statistics of Soliton
The characteristic function of soliton phase jitter is found analytically
when the soliton is perturbed by amplifier noise. In additional to that from
amplitude jitter, the nonlinear phase noise due to frequency and timing jitter
is also analyzed. Because the nonlinear phase noise is not Gaussian
distributed, the overall phase jitter is also non-Gaussian. For a fixed mean
nonlinear phase shift, the contribution of nonlinear phase noise from frequency
and timing jitter decreases with distance and signal-to-noise ratio.Comment: 8 pages, submitted to JOSA
On the effect of dispersion on nonlinear phase noise
The variance of nonlinear phase noise is analyzed by including the effect of
intrachannel cross-phase modulation (IXPM)-induced nonlinear phase noise.
Consistent with Ho and Wang [1] but in contrary to the conclusion of both Kumar
[2] and Green et al. [3], the variance of nonlinear phase noise does not
decrease much with the increase of chromatic dispersion. The results are
consistent with a careful reexamination of both Kumar [2] and Green et al. [3].Comment: 3 pages, 1 figure, submitted to Optics Letter
Comparison of Nonlinear Phase Noise and Intrachannel Four-Wave-Mixing for RZ-DPSK Signals in Dispersive Transmission Systems
Self-phase modulation induced nonlinear phase noise is reduced with the
increase of fiber dispersion but intrachannel four-wave-mixing (IFWM) is
increased with dispersion. Both degrading DPSK signals, the standard deviation
of nonlinear phase noise induced differential phase is about three times that
from IFWM even in highly dispersive transmission systems.Comment: 3 pages, 2 figure
Condensation phase transition in nonlinear fitness networks
We analyze the condensation phase transitions in out-of-equilibrium complex
networks in a unifying framework which includes the nonlinear model and the
fitness model as its appropriate limits. We show a novel phase structure which
depends on both the fitness parameter and the nonlinear exponent. The
occurrence of the condensation phase transitions in the dynamical evolution of
the network is demonstrated by using Bianconi-Barabasi method. We find that the
nonlinear and the fitness preferential attachment mechanisms play important
roles in formation of an interesting phase structure.Comment: 6 pages, 5 figure
Controlling the second-harmonic in a phase matched negative-index metamaterial
Nonlinear metamaterials (NLMMs) have been predicted to support new and
exciting domains in the manipulation of light, including novel phase matching
schemes for wave mixing. Most notable is the so-called nonlinear-optical
mirror, in which a nonlinear negative-index medium emits the generated
frequency towards the source of the pump. For the first time, we experimentally
demonstrate the nonlinear-optical mirror effect in a bulk negative-index NLMM,
along with two other novel phase matching configurations, utilizing periodic
poling to switch between the three phase matching domains.Comment: 5 pages, 7 figure
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