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When collinear dual-color intense laser pulses are overlapped in time, a strong coupling interaction occurs between their plasma filaments. Due to the cross phase modulation, strong non-linear effects are generated and the spectrum width of the ultrafast ultraviolet (UV) pulse is further broadened. The original UV pulse with a bandwidth of 15 nm and energy of 045 mJ is obtained by tripling the frequency of a Ti:sapphire laser system. The UV pulse and the near inferred pulse of 71 mJ can induce plasma filaments separately after focusing within an argon gas cell, leading to an obvious modulation of the UV spectrum. The full width at half maximum of UV spectrum increases to 64 nm which is 4 times the width of spectrum before focusing and 25 times the width of single ultraviolet filament broadening. In this experiment, we mainly study the frequency spectrum evolution of dual-color co-filament in argon gas under the condition of different time delays, coupling locations and gas pressures. Optimizing these factors can yield a valid approach to achieving extremely ultrafast pulses in the range of ultraviolet.
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Keywords:
- ultrafast ultraviolet pulse /
- dual-color filaments /
- nonlinear effects /
- spectrum broadening
[1] ［1］Chen X W, Liu J, Zhu Y, Leng Y X, Ge X C, Li R X, Xu Z Z 2005 Acta Phys. Sin. 54 3665 (in Chinese) ［陈晓伟、 刘军、朱毅、冷雨欣、葛晓春、李儒新、徐至展 2005 物理学报 54 3665］
[2] ［2］ Brixner T, Damrauer N H, Niklaus P, Gerber G 2001 Nature 414 57
[3] ［3］ Kasparian J, Rodriguez M, Mejean G, Yu J, Salmon E, Wille H, Bourayou R, Frey S, Andre Y B, Mysyrowicz A, Sauerbrey R, Wolf J P, Woste L 2003 Science 301 61
[4] ［4］ Couairon A, Mysyrowicz A 2007 Phys. Rep. 44 47
[5] ［5］ Cao S Y, Song Z M, Qin Y, Wang Q Y, Zhang Z G 2009 Acta Phys. Sin. 58 3971 (in Chinese) ［曹士英、 宋振明、秦瑀、王清月、张志刚 2009 物理学报 58 3971］
[6] ［6］ Kasparian J, Wolf J P 2008 Opt. Express 16 466
[7] ［7］ Fuji T, Horio T, Suzuki T 2007 Opt. Lett. 32 2481
[8] ［8］ Zair A, Guandalini A, Schapper F, Holler M, Biegert J, Gallmann L, Couairon A, Franco M, Mysyrowicz A, Keller U 2007 Opt. Express 15 5394
[9] ［9］ Trushin S A, Kosma K, Fuss W, Schmid E 2007 Opt. Lett. 32 2432
[10] ］ Chen X, Li X, Liu J, Wei P, Ge X, Li R, Xu Z 2007 Opt. Lett. 32 2402
[11] ］ Fuji T, Suzuki T 2007 Opt. Lett. 32 3330
[12] ］ Hauri C P, Kornelis W, Helbing F W, Heinrich A, Couairon A, Mysyrowicz A, Biegert J, Keller U 2004 Appl. Phys. B 79 673
[13] ］ Couairon A, Biegert J, Hauri C P, Kornelis W, Helbing F W, Keller U, Mysyrowicz A 2006 J. Mod. Opt. 53 75
[14] ］ Couairon A, Franco M, Mysyrowicz A, Biegert J, Keller U 2005 Opt. Lett. 30 2657
[15] ］ Hauri C P, Guandalini A, Eckle P, Kornelis W, Biegert J, Keller U 2005 Opt. Express 13 7541
[16] ］ Wille H, Rodriguez M, Kasparian J, Mondelain D, Yu J, Mysyrowicz A, Sauerbrey R, Wolf J P, Woste L 2002 Eur. Phys. J.: Appl. Phys. 20 183
[17] ］ Skupin S, Bergé L, Peschel U, Lederer F, Mejean G, Yu J, Kasparian J, Salmon E, Wolf J P, Rodriguez M, Woste L, Bourayou R, Sauerbrey R 2004 Phys. Rev. E 70 046602
[18] ］ Walter D, Eyring S, Lobhreier J, Spitzenpfeil R, Spielmann C 2007 Appl. Phys. B 88 175
[19] ］ Ackermann R, Salmon E, Lascoux N, Kasparian J, Rohwetter P, Stelmaszczyk K, Li S H, Lindinger A, Wste L, Béjot P, Bonacina L, Wolf J P 2006 Appl. Phys. Lett. 89 171117
[20] ］ Kolesik M, Roskey D E, Moloney J V 2007 Opt. Lett. 32 2753
[21] ］ Béjot P, Kasparian J, Wolf J P 2008 Opt. Express 16 14115
[22] ］ Becker A, Akzbek N, Vijayalakshmi K, Oral E, Bowden C M, Chin S L 2001 Appl. Phys. B 73 287
[23] ］ Kasparian J, Sauerbrey R, Chin S L 2000 Appl. Phys. B 71 877
[24] ］ Zhang L P, Li H N, Wu H, Li X, Ding L E 2008 Acta Phys. Sin. 57 904 (in Chinese) ［张丽平、 李海宁、吴洪、李贤、丁良恩 2008 物理学报 57 904］
[25] ］ Couairon A, Chakraborty H S, Gaarde M B 2008 Phys. Rev. A 77 053814
[26] ］ Hu W Y, Wang E Y, Li W X, Ding L E 2007 Acta Opt. Sin. 27 181(in Chinese) ［胡婉约、王二玉、李文雪、丁良恩 2007 光学学报 27 181］
[27] ］ Chin S L, Hosseini S A, Liu W, Luo Q, Théberge F, Akzbek N, Becker A, Kandidov V P, Kosareva O G, Schroeder H 2005 Can. J. Phys. 83 863
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[1] ［1］Chen X W, Liu J, Zhu Y, Leng Y X, Ge X C, Li R X, Xu Z Z 2005 Acta Phys. Sin. 54 3665 (in Chinese) ［陈晓伟、 刘军、朱毅、冷雨欣、葛晓春、李儒新、徐至展 2005 物理学报 54 3665］
[2] ［2］ Brixner T, Damrauer N H, Niklaus P, Gerber G 2001 Nature 414 57
[3] ［3］ Kasparian J, Rodriguez M, Mejean G, Yu J, Salmon E, Wille H, Bourayou R, Frey S, Andre Y B, Mysyrowicz A, Sauerbrey R, Wolf J P, Woste L 2003 Science 301 61
[4] ［4］ Couairon A, Mysyrowicz A 2007 Phys. Rep. 44 47
[5] ［5］ Cao S Y, Song Z M, Qin Y, Wang Q Y, Zhang Z G 2009 Acta Phys. Sin. 58 3971 (in Chinese) ［曹士英、 宋振明、秦瑀、王清月、张志刚 2009 物理学报 58 3971］
[6] ［6］ Kasparian J, Wolf J P 2008 Opt. Express 16 466
[7] ［7］ Fuji T, Horio T, Suzuki T 2007 Opt. Lett. 32 2481
[8] ［8］ Zair A, Guandalini A, Schapper F, Holler M, Biegert J, Gallmann L, Couairon A, Franco M, Mysyrowicz A, Keller U 2007 Opt. Express 15 5394
[9] ［9］ Trushin S A, Kosma K, Fuss W, Schmid E 2007 Opt. Lett. 32 2432
[10] ］ Chen X, Li X, Liu J, Wei P, Ge X, Li R, Xu Z 2007 Opt. Lett. 32 2402
[11] ］ Fuji T, Suzuki T 2007 Opt. Lett. 32 3330
[12] ］ Hauri C P, Kornelis W, Helbing F W, Heinrich A, Couairon A, Mysyrowicz A, Biegert J, Keller U 2004 Appl. Phys. B 79 673
[13] ］ Couairon A, Biegert J, Hauri C P, Kornelis W, Helbing F W, Keller U, Mysyrowicz A 2006 J. Mod. Opt. 53 75
[14] ］ Couairon A, Franco M, Mysyrowicz A, Biegert J, Keller U 2005 Opt. Lett. 30 2657
[15] ］ Hauri C P, Guandalini A, Eckle P, Kornelis W, Biegert J, Keller U 2005 Opt. Express 13 7541
[16] ］ Wille H, Rodriguez M, Kasparian J, Mondelain D, Yu J, Mysyrowicz A, Sauerbrey R, Wolf J P, Woste L 2002 Eur. Phys. J.: Appl. Phys. 20 183
[17] ］ Skupin S, Bergé L, Peschel U, Lederer F, Mejean G, Yu J, Kasparian J, Salmon E, Wolf J P, Rodriguez M, Woste L, Bourayou R, Sauerbrey R 2004 Phys. Rev. E 70 046602
[18] ］ Walter D, Eyring S, Lobhreier J, Spitzenpfeil R, Spielmann C 2007 Appl. Phys. B 88 175
[19] ］ Ackermann R, Salmon E, Lascoux N, Kasparian J, Rohwetter P, Stelmaszczyk K, Li S H, Lindinger A, Wste L, Béjot P, Bonacina L, Wolf J P 2006 Appl. Phys. Lett. 89 171117
[20] ］ Kolesik M, Roskey D E, Moloney J V 2007 Opt. Lett. 32 2753
[21] ］ Béjot P, Kasparian J, Wolf J P 2008 Opt. Express 16 14115
[22] ］ Becker A, Akzbek N, Vijayalakshmi K, Oral E, Bowden C M, Chin S L 2001 Appl. Phys. B 73 287
[23] ］ Kasparian J, Sauerbrey R, Chin S L 2000 Appl. Phys. B 71 877
[24] ］ Zhang L P, Li H N, Wu H, Li X, Ding L E 2008 Acta Phys. Sin. 57 904 (in Chinese) ［张丽平、 李海宁、吴洪、李贤、丁良恩 2008 物理学报 57 904］
[25] ］ Couairon A, Chakraborty H S, Gaarde M B 2008 Phys. Rev. A 77 053814
[26] ］ Hu W Y, Wang E Y, Li W X, Ding L E 2007 Acta Opt. Sin. 27 181(in Chinese) ［胡婉约、王二玉、李文雪、丁良恩 2007 光学学报 27 181］
[27] ］ Chin S L, Hosseini S A, Liu W, Luo Q, Théberge F, Akzbek N, Becker A, Kandidov V P, Kosareva O G, Schroeder H 2005 Can. J. Phys. 83 863
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