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Nonlinear phase noise (NPN) in polarization-division-multiplexed DPSK systems is analyzed. It is found that the absolute NPN is inversely proportional to the square-root of channel spacing, while the differential NPN depends on the launch condition.
We experimentally demonstrate a stimulated Brillouin scattering free, all fiber phase conjugator using 1-m length of our fabricated bismuth oxide-based nonlinear fiber. Using the conjugator, error-free, dispersion compensated transmission of a 10-Gbit/s NRZ signal over a 150 km SMF transmission link is readily achieved.
An overview of nonlinearities in optical fibers starting from fundamental interactions to their application in optical communication systems will be presented. Advanced techniques to mitigate or to use fiber nonlinearities will be reviewed.
We present a novel silica fiber taper modal Mach-Zehnder interferometer design for low-cost broadband DPSK demodulation and multi-channel duobinary signals generation. The design is compact, temperature-insensitive and easily fabricated in standard single mode fiber.
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