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Centralized monitoring of high‐loss optical fiber links is a major concern for network operators. Despite the recurrent deployment of optical time domain reflectometry (OTDR) techniques, which have been progressively improved over the past few decades, proposed solutions still lack the required dynamic range for achieving long distances and, at the same time, high resolution. This is especially true...
We propose and demonstrate a tunable optical time-domain reflectometer (OTDR) for in-service monitoringof wavelength-division-multiplexed passive optical networks (WDM-PONs). The proposed method is proved for different continuous wavetuneable laser sources (CW TLS), and uses semiconductor optical amplifier (SOA) as a switch for the probe signal. We also improve the results using different methods...
In this paper we give an overview of different approaches to reduce the influence of the interferometric crosstalk in a Passive Optical Network employing Wavelength Division Multiplexing (WDM-PON) and a Reflective Semiconductor Optical Amplifier-based (RSOA) transceiver in the Optical Network Unit (ONU). Key advantages and disadvantages of each method are given.
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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