R. J. Manning

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In this paper we will discuss the implications of using all-optical OFDM in the network, the need for synchronisation and clock recovery, and demonstrate a simple all-optical clock recovery system for such superchannels. The recovered analogue clock was used to generate a second comb synchronised to the original from the transmitter.
We report for the first time an ultra-stable optical-carrier dissemination technique for transmission over a 20 km unidirectional fibre link. The optical-linewidth of the recovered carrier matches closely that of the original carrier.
In this paper we will discuss a range of applications, pertinent to phase-modulated OFDM superchannels, for which optical signal processing can be used. We demonstrate a novel technique for clock recovery of a 53.5 Gbit/s BPSK superchannel, which uses the well-known four-wave mixing process in a SOA.
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