E-field of a laser pulse and Intensity

  • Thread starter PhysMaster
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  • #1
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Hi,
What is the equation for a E field of a single pulse of a laser?
If that laser is shined onto say a grating spectroscope (square law detector), how can I go about deriving an expression for Intensity as a function of frequency at the output of the spectroscope?

I know that the square law detector will measure Energy which is the square of the E field (and some proportionality factor that I don't know).
I also know Intensity equation, I = 1/2 Epsilon * c * E^2 where Epsilon is the permittivity in vacuum. But that doesnt seem to apply here since it has no dependence on frequency.

Any help is much appreciated.
 

Answers and Replies

  • #2
jtbell
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Frequency and intensity are independent of each other, in general. Why do you think there should be a relationship between them?
 

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