Pulse Compression of Short Wavelength Infrared Optical Parametric Amplified Pulses Using a Hollow Core Capillary

University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

Abstract: In this thesis, a method for producing few-cycle short wavelength infrared pulses is presented. The pulses are created by down converting the 800 nm output of a Ti:Sapphire laser in an optical parametric amplifier to 1300 nm, and spectrally broadened in a hollow core fiber in order to obtain a short transform limited pulse duration. Further, they are to be compressed using the anomalous dispersion of a potassium dihydrogen phostphate crystal. The aim of the compression is to generate few cycle pulses in the short wave infrared regime for future high-order harmonic generation experiments. By increasing the wavelength, the energy of the harmonics will be increased, which would allow for new kinds of experiments to be conducted. The pulses have been successfully broadened to support a four cycle duration, however, compression of the pulses remains to be done.

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