Sinc-shaped Nyquist pulses possess a rectangular spectrum, enabling data to be encoded
in a minimum spectral bandwidth and satisfying by essence the Nyquist criterion of zero inter …

We propose and demonstrate a new optical spectrally efficient frequency division
multiplexing (O-SEFDM) system, where non-orthogonal and overlapping sub-carriers are …

With the ever-increasing traffic demands, the infrastructure of current 10 Gbit/s optical
network needs to be enhanced. The legacy infrastructure can be enhanced not only by …

We propose several algorithms to achieve hitless bandwidth defragmentation using
spectrum retuning in elastic optical networks. Two retuning techniques, spectrum sweeping …

We report the results of two field trials aimed at achieving high fiber capacity over regional
and long-haul distances. In the first trial, 41 superchannels with digital Nyquist pulse …

We demonstrate a remotely seeded flexible passive optical network (PON) with multiple low-
speed subscribers but only a single optical line terminal transceiver operating at a data rate …

We evaluate the impact of variable-code-rate transceivers on cost, capacity and survivability
of wavelength-routed optical networks. The transmission rate and reach trade-off is …

We focus on Nyquist-WDM-based flexible optical networks and examine the impact of
introducing flexibility in physical layer design parameters on the network level performance …

We demonstrate that the optical Fourier transform and cyclic prefix in an all-optical OFDM
transmitter can be simultaneously implemented using a liquid crystal on silicon wavelength …

We report on high-speed multilevel signal generation and arbitrary pulse shaping with
silicon-organic hybrid (SOH) Mach-Zehnder interferometer (MZI) modulators. Pure phase …