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The transmission of a single fundamental mode in a fiber with cutoff wavelength above the transmission band is studied as a means of allowing a larger fiber effective area and reducing fiber nonlinearity. The reduction of nonlinear impairments is achieved at the expense of a potential new linear impairment in the form of multipath interference (MPI). We use a power-coupled-mode formalism to analyze...
Using a transmission fiber with a zero differential modal dispersion wavelength and a gain-equalized few-mode EDFA, we demonstrate mode-multiplexed transmission over a fiber recirculating loop with all few-mode components.
We report graded index few mode fiber designs for mode-division multiplexing and demonstrate a 100-km few-mode fiber span with effective areas larger than 160 μm2 and differential mode group delay of less than 6 ps/km.
We investigate interchannel nonlinearity compensation in a 3×114-Gb/s WDM system at 50-GHz channel spacing. Three sampling oscilloscopes simultaneous capture the waveforms at the three wavelengths, and the signals are jointly backpropagated to undo XPM.
We report the transmission of 3×112-Gb/s DP-16QAM at 20 GHz channel spacing over 35×80-km spans of ultra-large effective area fiber (ULAF), with interchannel nonlinearity compensation at a coherent receiver.
We demonstrate mode-division multiplexed WDM transmission using the LP01 and LP11 modes of a few-mode fiber. The signal is recovered using a 6×6 MIMO equalizer at the receiver after amplification by a few-mode EDFA.
We designed and built a novel all-optical re-timing, re-amplifying, and re-shaping (3R) regeneration system based on terahertz optical asymmetric demultiplexers (TOADs) developed in our laboratory. The system is capable of parallel processing multiple wavelengths, a feature which will significantly improve the scalability of current wavelength division multiplexing (WDM) networks. Performance against...
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