I assume you meant '"field autocorrelation" instead of "Intensity autocorrelaton". What was your reference regarding "I know that from intensity autocorrelation, I simply need to divide the FWHM by 1.53 for sech2 pulses."? Was that numerical factor derived in your reference?Summary:: How do I get the pulse width from interferometric autocorrelation?
I know that from intensity autocorrelation, I simply need to divide the FWHM by 1.53 for sech2 pulses.
But I can't seem to be able to find any reference on how to get pulse width from interferometric autocorrelation signal.
Can someone help me?
Intensity autocorrelation uses second harmonic generation from two non-collinear beam. It cannot resolve the fringes of a multi-cycle pulse.What is the difference between "interferometric autocorrelation" and "intensity autocorrelation"?
There seems to be some difference between "field autocorrelation" and "interferometric autocorrelation" - the latter uses second harmonic generation while the first directly measures the pulse itself. As for the reference, I couldn't find the detailed derivation but I believe taking an autocorrelation of sech2 envelope can be done.I assume you meant '"field autocorrelation" instead of "Intensity autocorrelaton". What was your reference regarding "I know that from intensity autocorrelation, I simply need to divide the FWHM by 1.53 for sech2 pulses."? Was that numerical factor derived in your reference?
Slides 15, 17-21 have the relevant calculations; are you able to verify the numerical factors on your own?There seems to be some difference between "field autocorrelation" and "interferometric autocorrelation" - the latter uses second harmonic generation while the first directly measures the pulse itself. As for the reference, I couldn't find the detailed derivation but I believe taking an autocorrelation of sech2 envelope can be done.
https://www.brown.edu/research/labs...ch.labs.mittleman/files/uploads/lecture14.pdf