- #1
Aerozeppelin
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Homework Statement
A beam of wavelength 600 nm has initially an intensity profile of Gaussian shape with a
fwhm of 1 mm. Determine the intensity profile and fwhm 10 meter away.
Homework Equations
FWHM = λ/(2NA√(1 + I/Is))
The Attempt at a Solution
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FWHM1 = 1mm = 600 nm/(2NA√(1 + I/Is))
(2NA√(1 + I/Is)) = 0.0006m
NA2(1+ I/Is) = 0.00015
10meters away :
NA2(1+ I/Is) = (0.00015)/10 = 0.000015