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Colorless ONU With All-Optical Clock Recovery for Full-Duplex Dense WDM PONs

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7 Author(s)
Maziotis, A. ; Sch. of Electr. & Electron. Eng., Nat. Tech. Univ. of Athens, Athens, Greece ; Schrenk, B. ; Bakopoulos, P. ; Spyropoulou, M.
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We propose a colorless optical network unit (ONU) comprised of a Fabry-Pérot filter (FPF) and a semiconductor optical amplifier (SOA) for all-optical clock recovery of the downstream signal, followed by a Mach-Zehnder modulator (MZM) as the upstream modulator. The all-optical clock recovery performs data erasure allowing for efficient wavelength reuse of the downstream signal for upstream remodulation. Operation at a full-duplex 10-Gb/s symmetrical data rate and 20-dB loss budget is demonstrated over fiber spans of 50 km.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 20 )