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Ultrahigh-speed optical transmission technology, such as optical time domainmultiplexing or optical signal processing is a key point for increasing thecommunication capacity. The system performances are strongly related to pulseproperties. We present an original method dedicated to short pulse-shapecharacterization with high repetition rate using standard opticaltelecommunications equipments. Its principle is based on temporal measurementof the contrast produced by the beating of two delayed optical pulses in a highbandwidth photo detector. This technique returns firstly reliable informationon the pulse-shape, such as pulse width, shape and pedestal. Simulation andexperimental results evaluate the high-sensitivity and the high-resolution ofthe technique allowing the measurement of pulse extinction ratio up to 20 dBwith typical timing resolution of about 100 fs. The compatibility of thetechnique with high repetition rate pulse measurement offers an efficient toolfor short pulse analysis.

High-sensitive Optical Pulse-Shape Characterization using a Beating-Contrast-Measurement Technique