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Mubeen
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- TL;DR Summary
- ultra short pulse
what will happen if two one femtosecond(1 fs) laser pulse interferes?
This is a very complicated question, actually. There's a lot going on with the "internal" coherence of the pulse itself, and unless you know the mutual coherence between the pulses, it's impossible to analyze.Mubeen said:TL;DR Summary: ultra short pulse
what will happen if two one femtosecond(1 fs) laser pulse interferes?
A simple case of 'not too short' pulses will only produce a pattern when the arrivals are near coincident and the depth of the fringes will depend on the relative amplitudes of the pulses over time. On boresight and coincident timing, the fringes should be deep but for other angles, the relative amplitudes will be different over time (because of the pulse delay in addition to the simple carrier phase effect). This is the same sort of effect that you get with Young's slits where the sources are finite widths and not omnidirectional and the fringes get weaker off axis.Mubeen said:iam curious to know whether the fringes will have good contrast?.