Role of intensity fluctuations in laser-beam apodization with a graded random phase window
Journal Article
·
· Opt. Lett.; (United States)
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 I-bar/sub s/ and an apodized component of mean intensity I-bar/sub a/. The apodizer intensity transmission is exp(-k/sup 2/(n-1)/sup 2/approx.(t/sup 2/)(r)), , where approx.(t/sup 2/)(r) 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 I-bar/sub a//I-bar/sub s/approx. >10/sup 2/.
- Research Organization:
- Department of Applied Science, University of California, Davis/Livermore, P. O. Box 808, L-794, Livermore, California 94550
- OSTI ID:
- 7011779
- Journal Information:
- Opt. Lett.; (United States), Journal Name: Opt. Lett.; (United States) Vol. 13:11; ISSN OPLED
- Country of Publication:
- United States
- Language:
- English
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