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

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    [CrossRef]
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  7. S. Regan, J. Marozas, J. Kelly, T. Boehly, W. Donaldson, P. Jaanimagi, R. Keck, T. Kessler, D. Meyerhofer, W. Seka, S. Skupsky, and V. Smalyuk, J. Opt. Soc. Am. B 17, 1483 (2000).
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    [CrossRef]
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2001 (1)

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

2000 (1)

1997 (3)

1995 (2)

1994 (1)

1993 (1)

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

1989 (1)

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

1986 (1)

1984 (1)

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

1983 (1)

R. H. Lehmberg and S. P. Obenschain, Opt. Commun. 46, 27 (1983).
[CrossRef]

Agrawal, G.

G. Agrawal, Nonlinear Fiber Optics, 2nd ed. (Academic, New York, 1995), Chap. 7.

Amano, S.

Arinaga, S.

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Boehly, T.

Chen, Z.

Craxton, R.

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

Deng, X.

Dixit, S.

Donaldson, W.

Jaanimagi, P.

Kanabe, T.

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Kato, Y.

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Keck, R.

Kelly, J.

Kessler, T.

Kitagawa, Y.

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Kobayashi, T.

A. Morimoto and T. Kobayashi, Proc. SPIE 2633, 622 (1995).
[CrossRef]

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Lawrence, G.

Lawson, J.

Lehmberg, R. H.

R. H. Lehmberg and S. P. Obenschain, Opt. Commun. 46, 27 (1983).
[CrossRef]

Letzring, S.

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

Liang, S.

Lin, Y.

Ma, R.

Manes, K.

Marozas, J.

Matsuoka, S.

S. Matsuoka, N. Miyanaga, S. Amano, and M. Nakatsuka, Opt. Lett. 22, 25 (1997).
[CrossRef] [PubMed]

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

S. Matsuoka, “The improvement of laser irradiance uniformity by coherence control,” doctoral dissertation (Osaka University, Osaka, Japan, 1997; in Japanese).

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Meyerhofer, D.

Mima, K.

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Miyaji, G.

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Miyanaga, N.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

S. Matsuoka, N. Miyanaga, S. Amano, and M. Nakatsuka, Opt. Lett. 22, 25 (1997).
[CrossRef] [PubMed]

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Morimoto, A.

A. Morimoto and T. Kobayashi, Proc. SPIE 2633, 622 (1995).
[CrossRef]

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Nakai, S.

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Nakano, H.

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Nakatsuka, M.

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

S. Matsuoka, N. Miyanaga, S. Amano, and M. Nakatsuka, Opt. Lett. 22, 25 (1997).
[CrossRef] [PubMed]

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Nugent, K.

Obenschain, S. P.

R. H. Lehmberg and S. P. Obenschain, Opt. Commun. 46, 27 (1983).
[CrossRef]

Park, J.

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

Powell, H.

Regan, S.

Rothenberg, J. E.

Seka, W.

Short, R.

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

Skupsky, S.

Smalyuk, V.

Sources, J.

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

Suzuki, K.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

Tsubakimoto, K.

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Urushihara, S.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

Yagi, K.

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

Yamamoto, Y.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

Yamanaka, C.

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Yoshida, H.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

Yoshii, T.

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

Yu, W.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

H. Nakano, N. Miyanaga, K. Yagi, K. Tsubakimoto, T. Kanabe, M. Nakatsuka, and S. Nakai, Appl. Phys. Lett. 63, 580 (1993).
[CrossRef]

J. Appl. Phys. (1)

S. Skupsky, R. Short, T. Kessler, R. Craxton, S. Letzring, and J. Sources, J. Appl. Phys. 66, 3456 (1989).
[CrossRef]

J. Opt. Soc. Am. B (2)

Opt. Commun. (1)

R. H. Lehmberg and S. P. Obenschain, Opt. Commun. 46, 27 (1983).
[CrossRef]

Opt. Lett. (3)

Phys. Rev. Lett. (1)

Y. Kato, K. Mima, N. Miyanaga, S. Arinaga, Y. Kitagawa, M. Nakatsuka, and C. Yamanaka, Phys. Rev. Lett. 53, 1057 (1984).
[CrossRef]

Proc. SPIE (2)

N. Miyanaga, S. Matsuoka, J. Park, K. Tsubakimoto, and M. Nakatsuka, Proc. SPIE 3047, 746 (1997).
[CrossRef]

A. Morimoto and T. Kobayashi, Proc. SPIE 2633, 622 (1995).
[CrossRef]

Rev. Laser Eng. (1)

S. Urushihara, T. Yoshii, Y. Yamamoto, K. Suzuki, H. Yoshida, and N. Miyanaga, Rev. Laser Eng. 29, 184 (2001; in Japanese).
[CrossRef]

Other (3)

G. Agrawal, Nonlinear Fiber Optics, 2nd ed. (Academic, New York, 1995), Chap. 7.

S. Matsuoka, “The improvement of laser irradiance uniformity by coherence control,” doctoral dissertation (Osaka University, Osaka, Japan, 1997; in Japanese).

G. Miyaji, S. Matsuoka, S. Urushihara, A. Morimoto, T. Kobayashi, and N. Miyanaga, Inertial Fusion Sciences and Applications 2001 (Elsevier, Amsterdam, to be published).

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Figures (4)

Fig. 1
Fig. 1

Optical arrangement for generating a 3D SSD beam. Inset, angular spectral dispersions introduced by gratings: QVM-EOMs, quasi-velocity-matched electro-optic modulators; YLF, LiYF4; BS, beam splitter; HM, half mirror; RFs, radio frequencies; G’s, diffraction gratings; PBSs, polarizing beam splitters; XPM, cross-phase modulator; DPs, dove prisms; M’s, beam magnifications; SBS, stimulated Brillouin scattering; other abbreviations defined in text.

Fig. 2
Fig. 2

Far-field beam patterns taken with and without a RPP for 1D, 2D, and 3D SSD.

Fig. 3
Fig. 3

Power spectra of the nonuniformity of FFPs integrated over a 2.5-ns pulse. The line profiles were extracted from 2D Fourier spectra along the dispersion direction of 16-GHz FM.

Fig. 4
Fig. 4

Comparison of the time-averaged feature of measured and simulated irradiation nonuniformities. Experimental: 1D (filled triangle), 2D (filled square), and 3D (filled circles) SSDs. Simulated: 1D (dotted curve), 2D (dashed curve), and 3D (thinner solid curve) SSDs. Thicker solid curve, theoretical prediction for an incoherent laser with a 5-ps coherence time.

Equations (1)

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φx,y,t=m=1Mδm sin2πνmt+Smx cos ϕm+y sin ϕm,

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