Third Order Dispersion

Dispersion related to a third-order dependence of the phase change on the frequency offset.

Third-order Dispersion results from the frequency dependence of the Group Delay dispersion. In the expansion of the Spectral Phase versus angular frequency offset, it is related to the third-order term.

In mode-locked lasers for pulse durations below roughly 30 femtoseconds, it is necessary to provide Dispersion Compensation not only for the group delay dispersion, but also for the third-order dispersion and possibly for even higher orders.

In many cases, the investigation of the effect of third order dispersion requires numerical pulse propagation modeling.

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