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We demonstrate a single-ended colorless coherent receiver using symmetric 3×3 coupler hybrids. This allows for colorless reception of fifty-five 112-Gb/s PDM-QPSK channels with 1-dB penalty and the receiver works well in transmission over 2560-km TrueWave-REACH-fiber.
Recent developments of dispersion compensating fibres are reviewed, with emphasis on how to handle dispersion curvature and variations in the slope of the DCF.
A new technique for reducing the splice loss between dispersion compensating and standard single mode fiber is presented. 0.4 dB splice loss is obtained by introducing an intermediate fiber between the dispersion compensating fiber (DCF) and single mode fiber (SMF). By using a specially designed intermediate fiber, the overall splice loss has been reduced from 0.7-0.8 dB to only 0.4 dB. This is to...
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