Kuizenga Siegman theory

A theory predicting the durations of Pulses from actively mode-locked lasers.

The Kuizenga Siegman theory is a theoretical treatment which allows to calculate the pulse duration of an actively mode-locked laser. The basic underlying idea is that active Mode locking involves two competing mechanisms acting on the duration of the circulating pulse:

  • The modulator causes a slight Attenuation of the wings of the pulse, effectively reducing the pulse duration.
  • Due to its limited gain bandwidth, the gain medium tends to reduce the bandwidth of the pulse and thus to increase the pulse duration.

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