- #1
thewall12
- 10
- 0
Homework Statement
Determine the ratio of the power contained within a circle of radius of w0 (in the transverse plane at z = 0) to the total power in the Gaussian beams of orders (0,0), (1,0), (0,1) and (1,1). Then compare the ratio of the power contained within a circle of radius w0/3 to the total power for the (0,0) and (1,1) Gaussian beams. (This transmission difference is the principle behind spatial filtering that is used to select the principal mode from a multimode beam.) You may find it easier to use cylindrical coordinates for this problem.
Homework Equations
The Attempt at a Solution
I've attached the solutions. The solutions are for #4. I'm not exactly sure how power and electric field are proportional. Can anybody explain that? Also, I don't understand how the integrals for TEM 01/10 and TEM11 were formulated.