Limit of Pulse Width

The mirror dispersion can be compensated by inserting into the ring resonator (Fig. 11.18) dispersive prisms which introduce different optical path lengths dpn(A) [11.49a]. This dispersion compensation can be optimized by 

In principle, the lower limit the pulse width is given by the 

Fourier limitation = a/5i, where a 1 is a constant which depends 

With this CMP technique pulse widths below 100 fs can be reached [11.51,52]. If the CPM ring dye laser is synchroneously pumped by a mode-locked argon laser stable operation over many hours can be realized [11.53]. Using a novel combination of saturable absorber dyes and a frequency doubled mode-locked Nd YAG laser as a pump, pulse widths down to 39 ps at A = 815 nm have been reported [11.54]. 

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Fig. 6.21 Theoretical lower limit of pulse width AT as a function of the spectral bandwidth Av of a mode-locked laser for different values of the dispersion parameter D [fs/THz] [751]...

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