1Tb/s OFDM Superchannel (5x224 Gb/s Dual-polarization)
Principle of OFDM superchannel with coherent detection and pilot-tones based equalization. 
» Keywords: OFDM, Equalization, DSP, Coherent, Pilot Tones, Orthogonal Frequency Division Multiplexing
» Available in: Optical System Demos
Upgrade of Legacy 10G WDM System with 40G and 100G Channels
Mixed data-rate WDM system. 
» Keywords: long-haul, WDM, DSP, CD, dispersion, NRZ, DP-QPSK, chromatic, DQPSK
» Available in: Optical System Demos
N-dimensional Coding for Space Division Multiplexing
This demo illustrates the use of multi-dimensional coding for space division multiplexing over few modes fibers. 
» Keywords: Modes, Coupling, DSP, Few-mode Fibers, Coherent, Space Division Multiplexing, LP, QAM, SDM, MIMO, Cross-talk
» Available in: Optical System Demos
All-Optical OFDM
This demo illustrates the principle of all-optical OFDM superchannel. 
» Keywords: OFDM, superchannel, coherent, Nyquist, Gate, Comb
» Available in: Optical System Demos
Nyquist Superchannel
This demo shows a Nyquist superchannel [1] with subcarriers spacing equal to the symbol rate. The required spectral shaping of the subcarriers is achieved by a proper shaping of the driving signal of the optical modulator. The driver generates a sequence of electrical impulses that are filtered with the required impulse response. In this example the Raised-Cosine electrical filters with a varying roll-off are used. For zero roll-off the pulse shape is described by a sinc(x) fucntion, which leads to a signal without inter-symbol interference and whose spectral width is equal to the symbol rate. Polarization multiplexing can be used to double the bit rate of the superchannel. 
» Keywords: Spectral, Superchannel, Spacing, Pulse, Nyquist, Shaping, Channel
» Available in: Optical System Demos
Space Division Multiplexing Transmission over 4 LP Modes using MIMO Digital Signal Processing
This demo illustrates the principle of space division multiplexing over few modes fibers. 
» Keywords: modes, DSP, few-mode fibers, coherent, space division multiplexing, LP, QAM, SDM, coupling, MIMO, cross-talk
» Available in: Optical System Demos
Simulation of Signal Transmission in Multicore Fibers
Illustrates how to simulate a multicore fiber based on its measured characteristics. 
» Keywords: Mode Dependent Loss, Fiber, MDL, Multicore, Mode Coupling, Mode-dependent attenuation, Multimode
» Available in: Fiber Optics Demos, Optical System Demos
5.9 Tb/s (44.8 bit/Hz over 1 THz) and Better Transmitter for Space Division Multiplexing over Multicore Fiber
The principle of an integrated WDM transmitter for space division multiplexing over several fiber cores is illustrated. 
» Keywords: cross-talk, multi-core, DSP, coherent, multicore, space division multiplexing, QAM, SDM
» Available in: Optical System Demos