開放式課程>>工程學群>>超快光學>>第28講 Record Short Pulses & MIFA

第28講 Record Short Pulses & MIFA


L28_A
         Record Short Pulses & MIFA
        2.1 fs (2011)
               FROG‐CRAB method
             Time‐of‐flight (TOF) spectrometer
              Info built in the electron spectrogram
              Measurement results
              Modified Interferometric Field Autocorrelation (MIFA)
              SHG with thick crystal
              SHG formalism
              Insight
 

L28_B
        Modified Interferometric Field Autocorrelation (MIFA)
        Modified field autocorrelation function
        MIFA: Frequency‐selective IA
        Example: Chirped pulse with double peaks
        How to retrieve G'1(τ) from S1(τ)?
        What can we know from G'1(τ)?
        Two traces & complete phase retrieval
        How to retrieve the complete phase
        Experimental results
        400 fs MIFA setup
        Record sensitivity
        7.2 fs MIFA setup
        7.2 fs pulse measurement

              Mid‐infrared MIFA setup
              MIR pulse measurement
              Advantages & limitations

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