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Application of adaptive feedback loop for ultra-violet femtosecond pulse shaper control

Application of adaptive feedback loop for ultra-violet femtosecond pulse shaper control

Optics Express 14(21): 10089-10094

We apply an adaptive feedback loop to control a ultra-violet (UV) femtosecond pulse shaping apparatus. The adaptive feedback control is implemented by a continuous parameter genetic algorithm. We use the adaptive shaper to compensate for the pulse chirp. The genetic algorithm produces a pulse with a width of 115 fs, identical to that of the transformlimited pulse. We then apply the adaptive shaper to the Stokes pulse in a femtosecond coherent anti-Stokes Raman scattering (CARS) experiment on dipicolinic acid solution. The algorithm maximizes the first CARS beat signal at the probe pulse delay of 650 fs. We confirm that a transformlimited Stokes pulse achieves the best detection sensitivity.

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Accession: 051607897

Download citation: RISBibTeXText

PMID: 19529403

DOI: 10.1364/OE.14.010089

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