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Depolarization is one of the most important sources of error in a quantum communication link that can be introduced by the quantum channel. Even though standard quantum process tomography can, in theory, be applied to characterize this effect, in most real-world implementations depolarization cannot be distinguished from time-varying unitary transformations, especially when the timescales are much...
Analog Radio-over-Fiber (a-RoF) has been the subject of increased interest in relation to next-generation optical networks due to its spectral efficiency and lower deployment cost. Nonetheless, some complexity arises from electro-optical conversion of the information signal due to the non-linear characteristic of the modulator's transfer function which causes inter-channel interference and poses a...
We present a monitoring technique that can be directly integrated in the transceiver for WDM/SCM-PON applications. It is based on the detection of the backscattered signal from a baseband tone and interpretation with the LASSO operator for multiple fault detection.
We present an automatic method for detecting and evaluating fault events in a fibre link. Two Photon Counting OTDR setups are presented (3.5 cm, 12 dB and 2.25 m, 29 dB) allied to a signal processing technique for automatic results.
We present a setup for detecting and evaluating fiber curvatures using high-resolution Photon-Counting OTDR. Our setup is based on a Time-to-Digital Converter which can account for a resolution of up to 2,8 centimeters.
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