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We demonstrate 40 × 43Gbit/s RZ-DQPSK transmission over 1000km of ultra-low-loss G.652 fibre with 250km amplifier spacing. Hybrid Raman-EDFA amplification with co- and contra-directional Raman pumping enables 27dB Raman gain per span and error-free post-FEC performance.
Optimum and robust dispersion maps are experimentally determined from a range of pre- and inline-dispersion compensation for a 56 Gb/s RZ-DQPSK hybrid linear link, and then investigated using 112 Gb/s Dual-Pol QPSK with coherent detection.
This paper discusses how commercial 40 Gb/s transponders can be used for upgrades of medium haul submarine links by taking into account dispersion optimisation requirements and co-existing channels.
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
In conventional optical data transmission schemes, electrical filters and/or optical filters are used to improve the quality of system performance. In this paper, improved design of dense wavelength division multiplexing (DWDM) optical systems is achieved by using a selective electrical filter assignment method. The methodology objective is to optimize system design and mitigate the effects of fiber...
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