Complete characterization of optical pulses by real-time spectral interferometry |
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Authors: | Berger Naum K Levit Boris Smulakovsky Vladimir Fischer Baruch |
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Affiliation: | Department of Electrical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel. |
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Abstract: | We demonstrate a simple method for complete characterization (of amplitudes and phases) of short optical pulses, using only a dispersive delay line and an oscilloscope. The technique is based on using a dispersive delay line to stretch the pulses and recording the temporal interference of two delayed replicas of the pulse train. Then, by transforming the time domain interference measurements to spectral interferometry, the spectral intensity and phase of the input pulses are reconstructed, using a Fourier-transform algorithm. In the experimental demonstration, mode-locked fiber laser pulses with durations of approximately 1 ps were characterized with a conventional fast photodetector and an oscilloscope. |
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