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The transmission performance of 50 GHz spaced 40 Gb/s RZ-DQPSK co-propagating with 10 Gb/s signals over legacy submarine fibre was investigated experimentally to show that it is dependent on both the modulation format of the 10 Gb/s signals and the dispersion map.
The transmission performance near a legacy fiber system's zero dispersion region is examined, and it is shown that 40 Gb/s RZ-DQPSK is less sensitive to the nonlinear effect than 10 Gb/s RZ-DPSK.
Optical burst switching using fast, bit-rate transparent switches is presented. Random contention is handled without using optical memory by wavelength conversion. We demonstrate error-free 10 and 40 Gb/s burst contention resolution in a 5times5 node prototype.
We developed an optical burst switching (OBS) network testbed with three nodes, where each node consisted of a fast 5 5 (Pb,La)(Zr,Ti)O optical matrix switch. A newly developed Ether frame media converter was successfully used to evaluate Layer-2 performance of the testbed, with a line rate of 40Gb/s. A dynamic deflection routing scheme for contention resolution is implemented. Error-free switching...
We show numerically that in a 40Gb/s-QPSK system, dispersion incompletely compensated by pre-distortion can be precisely equalized by a post-equalizer. The compensation capability is strongly dependent on the demodulation scheme, i.e. coherent or incoherent.
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