1.28 Tbaud Nyquist Signal Transmission using Time-Domain Optical Fourier Transformation based Receiver

Conversion of a DWDM signal to a single Nyquist channel based on a complete optical Fourier transformation

“…Note that the optical sampling in the receiver could be replaced with a time-tofrequency converter (based on time-domain OFT) followed by optical bandpass filtering as in a standard DWDM receiver. Hence, our technique can potentially be made fully compatible with existing DWDM systems 6 .…”

“…To achieve maximum spectral efficiency, the OTDM channel spacing ΔT is set equal to 1/(Nf S ). The Nyquist OTDM channel can be received in the time-domain using optical sampling 2 or in the frequencydomain using OFT-based time-to-frequency conversion 6 .…”

Optical Systems for Ultra-High-Speed TDM Networking

“…It has been shown numerically in [17] that there is not an inherent performance penalty associated with the OFT scheme compared to the time gating, whereas the total power spent on switching the cannels is significantly lower when using serial-to-parallel conversion. The implementation penalty associated with the use of OFT for serial-to-parallel conversion is continuously being improved and recently error free signal detection was achieved for converting 10 Gbit/s tributary channels from a 1.28 Tbit/s serial data signal into WDM channels [18]. This was achieved in highly nonlinear fiber by reducing the number of converted channels.…”

320 Gb/s Nyquist OTDM received by polarization-insensitive time-domain OFT

“…If the N-OTDM signal has been transmitted over distance before the detection, a clock recovery unit will be needed in the receiver to synchronize the pump pulse and the data signal [25]. The generated pump pulses are linearly chirped with a chirp rate of K/2 by propagation through another DCF and the chirp of the pump is transferred to the idler generated in the FWM process in the PM-HNLF.…”