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Gaussian Beam Optics

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Gaussian Beam Optics

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The Gaussian is a radially symmetrical distribution whose electric field variation is given by the following equation:r is defined as the distance from the center of the beam, and ω0 is the radius at which the amplitude is 1/e of its value on the axis.The Fourier Transform of this equation is also a Gaussian distribution. If we were to solve the Fresnel integral itself rather than the Fraunhofer approximation, we would find that a Gaussian source distribution remains Gaussian at every point along its path of propagation through the optical system. This makes it particularly easy to visualize the distribution of the fields at any point in the optical system.

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