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Ultrashort Optical Pulses

  • #1
If an ultrashort optical pulse has a complex wavefunction with central frequency corresponding to a wavelength = 585 nm and a Gaussian envelope of RMS width of 6 femtoseconds, how can I calculate how many optical cycles are contained in the pulse width?

Homework Equations





The Attempt at a Solution


Not too sure where to begin. I don't understand how a width can be measured in seconds. If it had been provided as a length, I would assume that one needs to simply divide that length by two times the wavelength to get the amount of cycles.
 

Answers and Replies

  • #2
6,054
390
When you say of something "in two minutes drive from here", you refer to a distance in terms of time.
 
  • #3
So then I suppose I can multiply it by the speed of light to get a distance, and then divide accordingly to get the answer?
 
  • #4
6,054
390
That sounds right. The only issue is that with this sort of duration one cannot really talk of a particular frequency, but I guess that's what the problem wants you to neglect.
 
  • #5
Sounds good. Thanks for the help.
 

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