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In typical techniques of smoothing by spectral dispersion (SSD), illumination uniformity cannot be further improved by increasing the pulse bandwidth due to the limitation of high-efficiency frequency tripling. Combined with the analysis of the schemes of four-color beam smoothing and multi-frequency modulator SSD, a novel scheme of beam smoothing using multi-central frequency and multi-color smoothing by spectral dispersion has been proposed, which not only can achieve high-efficiency frequency tripling, but also can obtain laser beams with nearly continuous spectrum and exhibit some specific advantages in far-field smoothing. Results show that the focal spot will be enlarged slightly but obviously further smoothed by the use of the new scheme. Compared to the typical SSD technique, the new scheme can decrease hot spots effectively and achieve the best irradiation in less time. Moreover, with independent combination of dispersion directions in each quadrant of grating array, a multi-dimensional smoothing on focal spot can be realized.
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Keywords:
- multi-central frequency and multi-color /
- smoothing by spectral dispersion /
- continuous spectrum /
- illumination uniformity in far field
[1] Skupsky S, Short R W, Kessler T, Craxton R S, Letzring S, Soures J M 1989 J. Appl. Phys. 66 3456
[2] Kato Y, Mima K, Miyanaga N, Arinaga S, Kitagawa Y, Naktsuka M, Yamanka C 1984 Phys. Rev. Lett. 53 1057
[3] Dixit S N, Thomas I M, Woods B W, Morgan A J, Henesian M A, Wegner P J, Powell H T 1993 Applied Optics 32 2543
[4] Geng Y C, Liu L Q, Wang W Y, Zhang Y, Huang W Q, Su J Q, Li P 2013 Acta Phys. Sin. 62 145201 (in Chinese) [耿远超, 刘兰琴, 王文义, 张颖, 黄晚晴, 粟敬钦, 李平2013 62 145201]
[5] Tsubakimoto K, Nakatsuka M, Nakano H, Kanabe T, Jitsuno T, Nakai S 1992 Opt. Commun. 91 9
[6] Two-Dimensional SSD on OMEGA 1996 LLE Rev. 69 1
[7] Haynam C A, Wegner P J, Auerbach J M, Bowers M W, Dixit S N, Erbert G V, Heestand G M, Henesian M A, Hermann M R, Jancaitis K S, Manes K R, Marshall C D, Mehta N C, Menapace J, Moses E, Murray J R, Nostrand M C, Orth C D, Patterson R, Sacks R A, Shaw M J, Spaeth M, Sutton S B, Williams W H, Widmayer C C, Whit e R K, Yang S T, Van Wonterghem B M 2007 Applied Optics 46 3276
[8] Cheng W Y, Zhang X M, Su J Q, Zhao S Z, Dong J, Li P, Zhou L D 2009 Acta Phys. Sin. 58 7012 (in Chinese) [程文雍, 张小民, 粟敬钦, 赵圣之, 董军, 李平, 周丽丹 2009 58 7012]
[9] Jiang X J, Zhou S L, Lin Z Q, Zhu J 2006 Acta Phys. Sin. 55 4595 (in Chinese) [江秀娟, 周申蕾, 林尊琪, 朱俭 2006 55 4595]
[10] Li P, Su J Q, Ma C, Zhang R, Jing F 2009 Acta Phys. Sin. 58 6210 (in Chinese) [李平, 粟敬钦, 马驰, 张锐, 景峰 2009 58 6210]
[11] Pennington D M, Henesian M A, Wilcox R B, Wilcox R B, Weiland T L, Eimerl D, Ehrlich R B, Laumann C W, Miller J L 1992 Proceedings of the 1st Annual International Conference on Solid-State Lasers for Application to Inertial Confinement Fusion Monterey California, American, May 30-June 2, 1995
[12] Collins T J B, Marozas J A, Anderson K S, Betti R, Craxton R S, Delettrez J A, Goncharov V N, Harding D R, Marshall F J, McCrory R L, Meyerhofer D D, McKenty P W, Radha P B, Shvydky A, Skupsky S, Zuegel J D 2012 Physics of Plasmas 19 056308
[13] Betti R, Zhou C D, Anderson K S, Perkins L J, Theobald W, Solodov A A 2007 Phys. Rev. Lett. 98 155001
[14] Baton S D, Koenig M, Brambrink E, Schlenvoigt H P, Rousseaux C, Debras G, Laffite S, Loiseau P, Philippe F, Ribeyre X, Schurtz G 2012 Phys. Rev. Lett. 108 195002
[15] Schmitt A J, Betti J W, Obenschain S P, Zalesak S T, Fyfe D E, Betti R Direct drive fusion energy Shock Ignition Designs for Sub-MJ Lasers 2008 (9)
[16] Li K 2007 Ph. D. Dissertation (Chengdu: Sichuan University) (in Chinese) [李琨 2007 博士学位论文(成都: 四川大学)]
[17] Rothenberg J E, Auerbach J M, Moran B D, Murray J E, Weiland T L, Wegner P J Implementation of smoothing by spectral dispersion on beamlet and NIF. LLNL, UCRL-JC-129771
[18] Zhou B J, Zhong Z Q, Zhang B 2012 61 214202 (in Chinese) [周冰洁, 钟哲强, 张彬 2012 61 214202]
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[1] Skupsky S, Short R W, Kessler T, Craxton R S, Letzring S, Soures J M 1989 J. Appl. Phys. 66 3456
[2] Kato Y, Mima K, Miyanaga N, Arinaga S, Kitagawa Y, Naktsuka M, Yamanka C 1984 Phys. Rev. Lett. 53 1057
[3] Dixit S N, Thomas I M, Woods B W, Morgan A J, Henesian M A, Wegner P J, Powell H T 1993 Applied Optics 32 2543
[4] Geng Y C, Liu L Q, Wang W Y, Zhang Y, Huang W Q, Su J Q, Li P 2013 Acta Phys. Sin. 62 145201 (in Chinese) [耿远超, 刘兰琴, 王文义, 张颖, 黄晚晴, 粟敬钦, 李平2013 62 145201]
[5] Tsubakimoto K, Nakatsuka M, Nakano H, Kanabe T, Jitsuno T, Nakai S 1992 Opt. Commun. 91 9
[6] Two-Dimensional SSD on OMEGA 1996 LLE Rev. 69 1
[7] Haynam C A, Wegner P J, Auerbach J M, Bowers M W, Dixit S N, Erbert G V, Heestand G M, Henesian M A, Hermann M R, Jancaitis K S, Manes K R, Marshall C D, Mehta N C, Menapace J, Moses E, Murray J R, Nostrand M C, Orth C D, Patterson R, Sacks R A, Shaw M J, Spaeth M, Sutton S B, Williams W H, Widmayer C C, Whit e R K, Yang S T, Van Wonterghem B M 2007 Applied Optics 46 3276
[8] Cheng W Y, Zhang X M, Su J Q, Zhao S Z, Dong J, Li P, Zhou L D 2009 Acta Phys. Sin. 58 7012 (in Chinese) [程文雍, 张小民, 粟敬钦, 赵圣之, 董军, 李平, 周丽丹 2009 58 7012]
[9] Jiang X J, Zhou S L, Lin Z Q, Zhu J 2006 Acta Phys. Sin. 55 4595 (in Chinese) [江秀娟, 周申蕾, 林尊琪, 朱俭 2006 55 4595]
[10] Li P, Su J Q, Ma C, Zhang R, Jing F 2009 Acta Phys. Sin. 58 6210 (in Chinese) [李平, 粟敬钦, 马驰, 张锐, 景峰 2009 58 6210]
[11] Pennington D M, Henesian M A, Wilcox R B, Wilcox R B, Weiland T L, Eimerl D, Ehrlich R B, Laumann C W, Miller J L 1992 Proceedings of the 1st Annual International Conference on Solid-State Lasers for Application to Inertial Confinement Fusion Monterey California, American, May 30-June 2, 1995
[12] Collins T J B, Marozas J A, Anderson K S, Betti R, Craxton R S, Delettrez J A, Goncharov V N, Harding D R, Marshall F J, McCrory R L, Meyerhofer D D, McKenty P W, Radha P B, Shvydky A, Skupsky S, Zuegel J D 2012 Physics of Plasmas 19 056308
[13] Betti R, Zhou C D, Anderson K S, Perkins L J, Theobald W, Solodov A A 2007 Phys. Rev. Lett. 98 155001
[14] Baton S D, Koenig M, Brambrink E, Schlenvoigt H P, Rousseaux C, Debras G, Laffite S, Loiseau P, Philippe F, Ribeyre X, Schurtz G 2012 Phys. Rev. Lett. 108 195002
[15] Schmitt A J, Betti J W, Obenschain S P, Zalesak S T, Fyfe D E, Betti R Direct drive fusion energy Shock Ignition Designs for Sub-MJ Lasers 2008 (9)
[16] Li K 2007 Ph. D. Dissertation (Chengdu: Sichuan University) (in Chinese) [李琨 2007 博士学位论文(成都: 四川大学)]
[17] Rothenberg J E, Auerbach J M, Moran B D, Murray J E, Weiland T L, Wegner P J Implementation of smoothing by spectral dispersion on beamlet and NIF. LLNL, UCRL-JC-129771
[18] Zhou B J, Zhong Z Q, Zhang B 2012 61 214202 (in Chinese) [周冰洁, 钟哲强, 张彬 2012 61 214202]
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