A 40-km length of optical fiber whose group-velocity dispersion decreases exponentially along its length has been fabricated. We experimentally compare the propagation of picosecond solitons through the dispersion-decreasing fiber with that through a constant-dispersion fiber of the same path-averaged dispersion. For a wide range of input powers, the output pulse widths of the dispersion-decreasing fiber are found to be as short as the input pulse widths, whereas the output pulse widths of the constant-dispersion fiber are significantly larger. Numerical simulations of the experiment are performed and are in good agreement with the experimental results.
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Stentz et al. (1995) studied this question.
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