Symmetrical waveform generation based on temporal pulse shaping using only an amplitude modulator is proposed and investigated. The fundamental principle of this technique is that the Fourier transform of a real and symmetrical waveform is still real and symmetrical. Therefore, it is possible to use an electro-optic modulator that is biased at the minimum transmission point to perform temporal spectrum shaping with a real signal that has both positive and negative values. The proposed approach provides a simple and effective solution to ultrashort symmetrical waveform generation.
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Chi et al. (2007) studied this question.
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