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We demonstrate record 109-Tb/s transmission of spatial division multiplexed (SDM) signals over 16.8 km using a seven-core fiber. Each SDM channel contains 97 WDM channels on a 100-GHz grid and 2×86-Gb/s polarization-multiplexed QPSK signals.
We designed and fabricated a multi-core fiber whose attenuation is less than 0.18 dB/km and effective area is about 80 μm2. Crosstalk was observed be less than -55.5 dB after 17.6 km propagation.
A black surface was created using electrostatic flocking with polyacrylonitrile (PAN) carbon flock fibers. Reflectance of diffused reflection for ultraviolet, visible, and near-infrared rays was measured using the created flocked surfaces. The resultant surface exhibits extremely low reflectance values. Furthermore, the authors measured thermal emissivity of carbon-fiber flocked surfaces. A sample...
Relation between fiber parameters and polarization changes due to mechanical vibration was investigated experimentally. We first revealed that smaller MFD non-circularity and fiber spin reduce polarization change and that low PMD fiber is desirable.
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