Abstract
Analysis indicates that a transparent window with graded random surface modulation will apodize a laser beam. Following the apodizer the laser beam consists of a scattered component of mean intensity Īs and an apodized component of mean intensity Īa. The apodizer intensity transmission is , where is the window surface modulation mean-squared amplitude, k is the radiation wave number, and n is the window refractive index. Interference between the scattered and unscattered radiation produces intensity fluctuations similar to laser speckle. For high-power applications, minimization of the probability of optical damage due to intensity fluctuations requires that Īa/Īs ≳ 102.
© 1988 Optical Society of America
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