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Optics Letters

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  • Vol. 27, Iss. 9 — May. 1, 2002
  • pp: 725–727

Three-directional spectral dispersion for smoothing of a laser irradiance profile

G. Miyaji, N. Miyanaga, S. Urushihara, K. Suzuki, S. Matsuoka, M. Nakatsuka, A. Morimoto, and T. Kobayashi  »View Author Affiliations


Optics Letters, Vol. 27, Issue 9, pp. 725-727 (2002)
http://dx.doi.org/10.1364/OL.27.000725


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Abstract

In inertial confinement fusion research, uniform laser irradiation on a fusion target is a key issue. We propose a new method of beam smoothing in which we use three-directional spectral dispersion to reduce the coherent speckle that is unavoidable in the usual two-directional spectral-dispersion scheme. We have used this smoothing technique in a Nd:glass laser system and have demonstrated that the coherent speckle is reduced by a factor of 2.9 from that in two-directional spectral dispersion.

© 2002 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(140.3300) Lasers and laser optics : Laser beam shaping
(350.2660) Other areas of optics : Fusion

Citation
G. Miyaji, N. Miyanaga, S. Urushihara, K. Suzuki, S. Matsuoka, M. Nakatsuka, A. Morimoto, and T. Kobayashi, "Three-directional spectral dispersion for smoothing of a laser irradiance profile," Opt. Lett. 27, 725-727 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-9-725


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