Measurements of the spatio-temporal profiles of femtosecond laser pulses

Nonlinear optics;Femtosecond;Lasers;Ultrashort pulse;Spatio-temporal

Gabolde, Pablo ; Physics

University:Georgia Institute of Technology

Department:Physics

关键词: Nonlinear optics;    Femtosecond;    Lasers;    Ultrashort pulse;    Spatio-temporal;   

Others  :  https://smartech.gatech.edu/bitstream/1853/16317/1/gabolde_pablo_200708_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

The main contributions of this thesis to the field of ultrashort pulse measurement are a new set of experimental tools to measure the spatio-temporal fields of femtosecond pulses, and a new simplified formalism to describe such fields in the presence of distortions.More specifically, we developed an experimental technique based on scanning-wavelength digital holography and frequency-resolved optical gating that allows the complete measurement of the electric field E(x,y,t) of trains of identical femtosecond pulses. A related method, wavelength-multiplexed digital holography, is also introduced. It achieves a single-shot measurement of the three-dimensional field E(x,y,t) but at a reduced resolution using a simple experimental apparatus. Both methods can be used to measure various spatio-temporal distortions that often plague femtosecond laser systems, in particular amplified ones.Finally, to unambiguously and intuitively quantify such distortions, we introduce normalized correlation coefficients so that a common language can be used to describe the severity of these effects.