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We demonstrate polarisation-insensitive parametric amplification in highly nonlinear fibre of a 2.048-Tbit/s dense WDM PDM 16-QAM signal with ∼10 dB on-off gain and simultaneous wavelength conversion and phase conjugation, with mean Q2 penalties of only 0.6 dB and 0.4 dB.
We report transmission experiments in few-mode fibers supporting 6 spatialand polarization modes, where low-loss photonic lanterns are used as mode multiplexers. We measured a transmission distance of 900 km for 32 WDM channels with a 100 GHz channel spacing and a distance of 1500 km for a single wavelength channel experiment.
We experimentally demonstrate transmission over a novel multicore fiber with 9 cores arranged in 3 groups of 3 cores, where strong coupling occurs within the groups and weak couplings between groups. We transmitted over 2500 km in a single group at a time and 715 km when all 9 cores are used. Low-loss 3D waveguides are used as couplers.
We demonstrate compensation of fiber nonlinearities using optical phase conjugation of an 8-channel WDM 32-Gbaud PDM QPSK signal. Conjugating phase every 600 km in a fiber loop enabled a 6000 km transmission over TrueWave fiber.
We demonstrate the generation of all-electronically multiplexed 107-Gbaud PDM-16QAM and its coherent detection using 72-GHz balanced photodetectors and a 63-GHz real-time oscilloscope.
We demonstrate combined WDM/MDM transmission over a novel few-mode fiber based 1 × 9 wavelength-selective switch that supports fibers with 6 spatial and polarization modes. The effect on transmission of cascaded passband filtering and mode-dependent loss build-up is investigated in detail.
We transmit 32 WDM channels over 12 spatial and polarization modes of 177 km few-mode fiber at a record spectral efficiency of 32 bit/s/Hz. The transmitted signals are strongly coupled and recovered using 12×12 multiple-input multiple-output digital signal processing.
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