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| • |
Broadest continuum is
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generated
by the fiber when the
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ultrafast
laser pulse is in the
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anomalous
dispersion region.
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The pulse intensity begins to
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self
Raman shift to longer
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wavelengths.
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Due to break up of these
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higher
order solitons, four-wave
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mixing
generates frequencies
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at
wavelengths shorter than
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zero
dispersion wavelength.
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