超短脉冲Bessel 光束和空间诱导色散效应
Spatially induced group-velocity-dispersion in propagation of ultrashort Pulsed bessel beams
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摘要: 给出了含时的波动方程的一族特解－超短脉冲Bessel光束，其脉冲光束的空间和时间部分可以做分离变量，空间部分在传输过程中保持Bessel光束不变，而时间脉冲部分的传输行为类似于在普通色散介质中的传输，此效应被称之为空间诱导色散效应。
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关键词:
- 脉冲光束 /
- 时空耦合 /
- 空间诱导色散效应 /
- 无衍射Bessel光束
Abstract: A new family of solution of the non-paraxial wave equation that depicts the ultrashort pulsed light beam propagation in free space is given, of which the spatial transverse part is Bessel function while the temporal profile can be arbitrary. Therefore the pulsed beam behaves like diffraction-free without any transverse spreading, while the temporal part changes as in the disperive medium, which is dominated by the so-called spatially induced group velocity dispersion (SIGVD). -
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