Title :
Real-time measurement of ultrashort laser pulses using principal component generalized projections
Author_Institution :
Southwest Sci. Inc., Santa Fe, NM, USA
Abstract :
Frequency-resolved optical gating (FROG) is a technique to measure ultrashort laser pulses that optically constructs a spectrogram of a laser pulse. A two-dimensional (2-D) phase retrieval algorithm is used to extract the intensity and phase of a pulse from its spectrogram. We have improved a recently presented principal component generalized projections algorithm (PCGPA) making it easier to implement and fast enough to allow real-time inversion of FROG spectrograms. A femtosecond oscilloscope, based on second-harmonic generation (SHG) FROG, that displays the intensity and phase of ultrashort laser pulses in real time utilizing the improved PCGP phase retrieval algorithm is presented
Keywords :
high-speed optical techniques; laser variables measurement; optical harmonic generation; 2D phase retrieval algorithm; FROG; FROG spectrograms; femtosecond oscilloscope; frequency-resolved optical gating; generalized projections; laser pulse; optically constructs; phase retrieval algorithm; principal component; real-time inversion; real-time measurement; second-harmonic generation; spectrogram; ultrashort laser pulses; Frequency measurement; Optical harmonic generation; Optical pulse generation; Optical pulses; Oscilloscopes; Projection algorithms; Pulse measurements; Spectrogram; Two dimensional displays; Ultrafast optics;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.686733
