Effects of spectral linewidth of ultrashort pulses on the spatiotemporal distribution of diffraction fields |
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Authors: | Jingzhou Xu Li Wang Guozhen Yang |
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Institution: | (1) Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | The spatiotemporal characteristics of electromagnetic pulses with ultrabroad spectral bandwidth in the far field are analyzed
by using classical scalar diffraction theory. The effects of the ratio of the frequency width to the central frequency on
the diffraction spatial distribution are discussed. It is concluded that the diffraction spatial distribution of the pulsed
radiation gets narrower than a monochromatic wave when the frequency width of the pulse is comparable to or larger than its
central frequency. |
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Keywords: | pulse propagation diffraction ultrabroad frequency bandwidth THz radiation |
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