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Irradiation nonuniformity due to imperfections of laser beams (1993)

Murakami, M. ; Nishihara, K. ; Azechi, H.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 74 (1993), S. 802-808

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Intractable low-mode nonuniformities caused by power imbalance or pointing error of beams are studied quasi-analytically based on Skupsky's axially symmetric model [S. Skupsky and K. Lee, J. Appl. Phys. 54, 3662 (1983)]. These nonuniformities can be improved by decreasing the imperfections σPΩ, or by increasing the number of laser beams NB: deteriorated irradiation uniformity is shown to be proportional to σPΩ/(square root of)NB. Criteria of these imperfections for high irradiation uniformity [≤1% root-mean square (rms)] are then presented in terms of NB. The model is further extended to treat general asymmetric beam patterns. Optimization of beam pattern is also a central issue.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.354869

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