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An automatic fiber-optical fault analysis system making use of a tunable photon counting optical time-domain reflectometry (OTDR) ($\nu$-OTDR) is proposed and demonstrated in a passive optical network testbed. The employment of the $\ell _1$ trend filter as a signal processing tool enables the minimization of the intrinsic coherent random noise impact on the acquired data and also an automatic identification...
We propose a fast fault supervision technique compatible with an efficient resilience scheme for WDM PON. Several drop fibres can be monitored simultaneously so that a significant reduction of operational cost can be achieved.
We present experiments on a wavelength-flexible WDM/TDM-PON with an integrated reconfigurable OADM and a reflective electro-absorption modulator. We successfully transmit multiple wavelength channels of 10 Gbit/s each over 27 km SSMF in different bandwidth allocation schemes.
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