Title :
Single-laser 32.5 Tbit/s Nyquist WDM transmission
Author :
Hillerkuss, David ; Schmogrow, Rene ; Meyer, Matthias ; Wolf, Stefan ; Jordan, Meinert ; Kleinow, Philipp ; Lindenmann, Nicole ; Schindler, Philipp C. ; Melikyan, Argishti ; Yang, Xin ; Ben-Ezra, Shalva ; Nebendahl, Bend ; Dreschmann, Michael ; Meyer, Joa
Author_Institution :
Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany
Abstract :
We demonstrate single-laser 32.5 Tbit/s 16QAM Nyquist wavelength division multiplexing transmission over a total length of 227 km of SMF-28 without optical dispersion compensation. A number of 325 optical carriers is derived from a single laser and encoded with dual-polarization 16QAM data using sinc-shaped Nyquist pulses. As we use no guard bands, the carriers have a spacing of 12.5 GHz equal to the symbol rate or Nyquist bandwidth of the data. We achieve a net spectral efficiency of 6.4 bit/s/Hz using a software-defined transmitter, which generates the electric drive signals for the electro-optic modulator in real time.
Keywords :
electro-optical modulation; optical fibre networks; optical fibre polarisation; quadrature amplitude modulation; software radio; wavelength division multiplexing; Nyquist bandwidth; bit rate 32.5 Tbit/s; dual-polarization 16QAM data; electric drive signals; electro-optic modulator; frequency 12.5 GHz; optical carriers; sinc-shaped Nyquist pulses; single-laser 16QAM Nyquist WDM transmission; software-defined transmitter; spectral efficiency; symbol rate; wavelength division multiplexing transmission; Nonlinear optics; Optical filters; Optical modulation; Optical pulse shaping; Optical receivers; Optical transmitters; Wavelength division multiplexing; Communication systems; Optical fiber communication; Pulse shaping methods; Quadrature amplitude modulation;
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.4.000715
