FROG measurement stands for Frequency-resolved optical gating, a cutting-edge technique for precise characterization of ultrafast laser pulses on the time scale of femtosecond; that is, one billionth of one millionth of a second. Participating students are expected to implement a homemade instrument for FROG measurement in the visible and near-IR spectral. Key steps includes: 1. selection of proper nonlinear crystal; 2. optical alignment with high spatial and temporal precision; 3. two-dimentional data acquisition; 4. retrieval of amplitude and phase of ultrafast laser pulse.
UROP participants will work independently or interdependently with a fellow UROP student, under the supervision of UROP advisor.
(i) Gain knowledge on principle of ultrafast lasers and nonlinear optics
(ii) Acquire basic skills for ultrafast laser alignment by building FROG assembly.
(iii) Use Labview to program instruments (motorized precision stage, spectrometer and DAQ) for data acquisition.
(iv) Apply retrieval algorithms for characterization of femtosecond pulse with FROG data