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In this work we build upon a methodology that employs time-averaged nonlinear detection to measure the duty cycle (and thus the pulse duration) of a signal under test (SUT). The technique employed TPA in silicon APDs, while in our technique the TPA in the chalcogenide fibre forms the basis of the nonlinear detection. Our technique has the key advantage of being fibre-based that allows for a long interaction...
We have demonstrated a sensitive technique for monitoring bit patterns used in BER testing and OTDM packet switched networks. A highly-sensitive, ultra-high resolution spectrometer has been developed to monitor the bit patterns at 2.5 Gbit/s.
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