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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

NEC Achieves 6.4-Tb/s Transmission

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Researchers from Tokyo-based NEC Corp. reported at the European Community Optical Communication Conference in Munich, Germany, that they have demonstrated a transmission capacity of 6.4 Tb/s over a 186-km fiber. The team developed technologies to enable the transmission of 160 channels at 40 Gb/s. NEC will continue work to commercialize the system.
The researchers used GaAs heterobipolar transistors to quadruple channel capacity, and a polarization interleave multiplexer and wavelength/polarization demultiplexer with automatic control over the polarization to double the spectral efficiency. They reduced polarization mode dispersion in the fiber and optical amplifiers to less than 0.8 ps.
Rocky Mountain Instruments - Laser Optics MR

Published: November 2000
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