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Opt Express. 2012 Feb 13;20(4):3781-6. doi: 10.1364/OE.20.003781.

Network-embedded self-tuning cavity for WDM-PON transmitter.

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Politecnico di Milano, Department of Electronics and Information, Via G.Ponzio 34/5, 20133 Milan, Italy.


A network-embedded self-tuning cavity is proved in wavelength division multiplexed passive optical network transmission over 32 channels. The external source-less topology takes advantage of a reflective element at the remote node and a reflective semiconductor optical amplifier at the optical network unit to establish a distribution-fiber based cavity. The bit error rate performance of up to 5-km cavities is presented with two optical network units simultaneously operating and with downstream signal co presence. The experimental analysis at 1.25 Gb/s provides an evaluation of polarization dependences when exploiting low polarization dependent gain reflective semiconductor optical amplifiers with 25-km and 50-km standard single mode fiber transmission.

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