Frequency comb generation by four-wave mixing and the role of
fiber dispersion
- Title :
Frequency comb generation by four-wave mixing and the role of
fiber dispersion
- Authors :
G. Sefler and K. Kitayama
- Journal :
IEEE J. Lightwave Technol., vol.16, pp.1596-1605, 1998.
- Abstract :
A fiber-optic frequency comb generator utilizes four-wave mixing (FWM)
to expand a modulated continuous wave (CW) lightwave into a comb of
discrete, equispaced frequencies. The sign and magnitude of the fiber
dispersion are shown to control comb expansion by affecting the
interference among different four-wave mixing interactions at
particular comb frequencies. Positive dispersion initiates comb
expansion while zero and negative dispersions suppress expansion.
Dispersion mapping engineers fiber links for maximum comb bandwidths.
By managing dispersion in a 35km link of dispersion-shifted fiber,
a frequency comb spanning 1.1 THz is experimentally demonstrated.
Promising applications include pulse train synthesis affording
low-chirp, arbitrarily profiled, short pulses.
- Key words :
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