Jürgen Kleinschmidt

Measurement of ultraviolet femtosecond pulses using the optical kerr effect

We demonstrate the optical Kerr shutter technique as a simple and powerful tool for the measurement of femtosecond pulses in the ultraviolet as well as in the visible spectral region. The method provides the third-order intensity correlation function which gives information about pulse asymmetry and pulse structures.

Ultrafast beam-deflection method and its application for measuring the transient refractive index of materials

We represent an ultrafast beam-deflection method as a simple and powerful tool for the time-resolved measurement of induced changes of the refractive index in the order of Δn=10−5. The method is applied for measuring the changes of components of the refractive index parallel and perpendicular to the pump-pulse polarization on a femtosecond time scale. Fused silica and CS2 are used as samples for demonstrating our method.

Measurement of ultraviolet subpicosecond pulses based on ultrafast beam deflection.

We describe a beam-deflection technique based on the ultrafast electronic Kerr effect for measuring the duration of ultrashort laser pulses in a wide spectral range. Using this method, which provides the third-order intensity correlation function, we have measured subpicosecond KrF laser pulses. The results are in good agreement with the Kerr-shutter autocorrelation measurement.