Real-Time Measurement of Ultrashort Laser Pulses Using Principal Component Generalized Projections
نویسنده
چکیده
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.
منابع مشابه
Recent Progress Toward Real-Time Measurement of Ultrashort Laser Pulses
Frequency-resolved optical gating (FROG) is a technique that produces a spectrogram of an ultrashort laser pulse optically. While a great deal of information about the pulse can be gleaned from its FROG trace, often it is desirable to obtain all of the pulse information immediately, in real time. Quantitative information about the pulse is not readily obtainable from its spectrogram without the...
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