M. Winter

TL;DR: An optical fast Fourier transform scheme is demonstrated that provides the necessary computing power to encode lower-bitrate tributaries into 10.8 and 26.0 Tbit s-1 line-rate orthogonal frequency division multiplexing (OFDM) data streams and to decode them from fibre-transmitted OFDM data streams.

TL;DR: Theoretical results and numerical simulations conclude that the EVM is an appropriate metric for optical channels limited by additive white Gaussian noise.

TL;DR: The analogy to optical orthogonal frequency division multiplexing is discussed and it is shown that using appropriate algorithms, Nyquist pulse shaped modulation formats can be encoded on a single wavelength at speeds beyond 100 Gbit/s in real-time.

TL;DR: A practical scheme to perform the fast Fourier transform in the optical domain is introduced, which performs an optical real-time FFT on the consolidated OFDM data stream, thereby demultiplexing the signal into lower bit rate subcarrier tributaries, which can then be processed electronically.

TL;DR: It is concluded that for optical channels with additive Gaussian noise the EVM metric is a reliable quality measure and for nondata-aided reception, BER below 0.01 can be estimated from measured EVM.