Consider a HeNe Laser emitting a Gaussian-beam with a beam waist radius of 0.8 mm and...
Consider a HeNe Laser emitting a Gaussian-beam with a beam waist radius of 0.8 mm and a divergence of 2 mrad!
The beam is then passing a telescope, expanding it by a factor of 30.
Calculate the beam diameter on the moon’s surface in a distance of 380000 km!
Homework Answers
Ans:
For diameter w = w0(1+(z/zr)2)1/2
For zr = πw02/λ
Where λ = πw0ϴ
So, λ = 5.024 * 10-6
zr = 0.4
beam diameter w = 760 km
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