We review the current state of ultra fast laser physics and technology. A brief description of ultra short laser pulse generation, amplification, compression and frequency conversion is presented together with the basic diagnostic tools used in the field. Applications of ultra short light pulses in science and technology are presented using selected examples of research results in physics, chemistry and telecommunications.
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Femtosecond, time-resolved, optical-heterodyne detected optical Kerr effect (OHD-OKE) measurements areshown to be a powerful and comprehensive tool for studying the dynamics in molecular liquids. In the experiments the transient polarizability anisotropy of chloroform, carbon tetrachloride, carbon disulfide, benzene, benzonitrile and toluene has been measured with 30 fs laser pulses generated by a home-built Ti:sapphire laser system.
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