光谱扫描滤波法提升飞秒激光信噪比的理论分析

马再如; 隋展; 冯国英; 孙年春; 王屹山; 张彬; 陈建国

doi:10.7498/aps.61.074206

摘要

在时间频率域中,啁啾脉冲被淹没在放大自发辐射等噪声中,且其瞬时频率线性分布,基于此,提出采用光谱扫描滤波的办法来提升高功率飞秒激光系统的信噪比,并以法布里珀罗干涉仪作为光谱扫描滤波器,对该法提升信噪比的效果进行了详细的理论分析.采用短时傅里叶变换方法,研究了光谱扫描滤波器对自发辐射放大(ASE)的滤波效果,数值分析表明,在时间抖动为-2 ps到2 ps之间、光谱扫描滤波器的通带宽度为0.4 nm条件下,该法能将飞秒激光系统的信噪比提升2个量级,而啁啾信号光以超过90%的透光率通过光谱扫描滤波器;级联光谱扫描滤波方式能进一步提升飞秒激光信噪比.

关键词:

Abstract

A scanning spectral filter method to improve the signal-noise-ratio in the femtosecond chains is proposed by using the characteristic that the instantaneous frequency varies with the time approximately linearly for the chirped pulse in the time-frequency domain. The scanning spectral filtering for reduing the amplification of spontaneous emission (ASE) intensity is analyzed in the time-frequency domain by using the Short-Time Fourier Transform method. The results show that the pulse contrast can be improved by two orders, and the transmission efficiency of the chirped pulse can exceed 90% when the synchronizing time jitter ranges from -2ps to 2ps and the chirp rate p from 0.9C/T2 to 1.10C/T2. Adopting the cascaded scanning filter to improve the pulse contrast is investigated too, which can improve the pulse contrast effectively. The great advantage of this novel nonlinear spectral filter technology is high energy and high peak intensity femtosecond chains for it filters out the ASE in the near field in temporal domain.

Keywords:

作者及机构信息

1.
西华大学物理与化学学院, 成都 610039;

2.
四川大学电子信息学院, 成都 610064;

3.
中国工程物理研究院激光聚变研究中心, 绵阳 621900;

4.
西安光学精密机械研究所瞬态光学技术国家重点实验室, 西安 710119

基金项目: 国家高新技术研究发展计划和瞬态光学与光子技术国家重点实验室开放基金(批准号:SKLST201007)资助的课题.

Authors and contacts

1.
College of Physics and Chemistry, Xihua University, Chengdu 610064, China;

2.
College of Electronics Information, Sichuan University, Chengdu 610064, China;

3.
Research Center of Laser Fusion CAEP, Mianyang 621900, China;

4.
Xi’an Institute of Optics and precision Mechanics, state Key Laboratory of Transient Optics and Photonics, Xian 710119, China

Funds: Project supported by the National High Technology Research and Development Program of China and the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (Grant Nos.SKLST201007).

参考文献

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[13]	Homoelle D,Gaeta A L,Yanovsky V,Mourou G 2002 Opt.Lett.27 1646
[14]	Wang Z H,Liu C,Shen Z W,Zhang Q,Teng H,Wei Z Y 2011 Opt.Lett.36 3194
[15]	Kiriyama H,Mori M,Nakai Y,Yamamoto Y,Tanoue M,Akutsu A,Shimomura T,Kondo S,Kanazawa S,Daido H,Kimura T,Miyanaga N 2007 Opt.Lett.32 2315
[16]	Ross I N,Matousek P,Towrie M,Langley A J,Collier J L 1997 Opt.Commun.114 125
[17]	Yoshida H,Ishii E,Kodama R,Fujita H,Kitagawa Y,Izawa Y,Yamanaka T 2003 Opt.Lett.28 257
[18]	Zeng S G,Zhang B,Dan Y Q,Sui Z,Sun N C 2010 Opt.Commun.283 4054
[19]	Wang Z H,Liu,C,Shen Z W,Wei Z Y 2011 Opt.Lett.36 319
[20]	Ren H Y,Qian L J,Zhu H Y 2010 Opt.Exp.218 12948
[21]	Hiromitsu K,Mori M,Yoshiki N 2010 Appl.Opt.49 2105
[22]	Bagnoud V,Zuegel J D,Forget N,Blanc C L 2007 Opt.Exp.15 5504
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施引文献

[1]	Bahk S W,Rousseau P,Planchon T A,Chvykov V,Kalintchenko G,Maksimchuk A,Mourou G A,Yanovsky V 2004 Opt.Lett.29 2837
[2]	Perry M D,Pennington D M,Stuart B C,Tietbohl G,Britten J A,Brown C,Herman S,Golick B,Kartz M,Miller J,Powell H T,Vergino M,Yanovsky V 1999 Opt.Lett.24 160
[3]	Bonlie J D,Patterson F,Price D,White B,White,Springer P 2000 Appl.Phys.B 70 S155
[4]	Huang X J,Peng H S,Wei X F,Wang X D,Zeng X M,Zhou K N,Guo Y,Liu L Q,Wang X,Zhu Q H,Lin D H,Tang X D,Zhang X M,Chu X L,Wang Q Y 2005 High Power Laser and Particle Beams 17 1685 (in Chinese)[黄小军,彭翰生,魏晓峰,王晓东,曾小明,周凯南,郭仪,刘兰琴,王逍,朱启华,林东晖,唐晓东,张小民,楚晓亮,王清月 2005 强激光与粒子束 17 1685]
[5]	Umstadter D 2001 Physics Plasmas 8 177
[6]	Wharton K B,Boley C D,Komashko A M,Rubenchik A M,Zweiback J,Crane J,Hays G,Cowan T E,Ditmire T 2001 Phys.Rev.E 64 02540121
[7]	Peng H S 2006 Chinese Journal of Lasers 33 721 (in Chinese)[彭翰生 2006 中国激光 33 721]
[8]	Li W C,Wang Z H,Liu C,Teng H,Wei Z Y 2011 Acta Phys.Sin.60 124210 (in Chinese)[李伟昌,王兆华,刘成,滕浩,魏志义 2011 物理学报 60 124210 ]
[9]	Chvykov V,Rousseau P,Reed S,Kalinchenko G,andYanovsky V 2006 Opt.Lett.31 1456
[10]	Liu C,Wang Z H,Li W C,Liu F,Wei Z Y 2010 Acta Phys.Sin.59 7036 (in Chinese)[刘成,王兆华,李伟昌,刘峰,魏志义 2010 物理学报 59 7036]
[11]	Lévy A,Ceccotti T,Oliveira P D,Réau F,Perdrix M,Quéré F,Monot P,Bougeard M,Lagadec H,Martin P 2007 Opt.Lett.32 310
[12]	Yanovsky Y,Felix C,Mourou G 2002 Appl.Phys.B 74 S181
[13]	Homoelle D,Gaeta A L,Yanovsky V,Mourou G 2002 Opt.Lett.27 1646
[14]	Wang Z H,Liu C,Shen Z W,Zhang Q,Teng H,Wei Z Y 2011 Opt.Lett.36 3194
[15]	Kiriyama H,Mori M,Nakai Y,Yamamoto Y,Tanoue M,Akutsu A,Shimomura T,Kondo S,Kanazawa S,Daido H,Kimura T,Miyanaga N 2007 Opt.Lett.32 2315
[16]	Ross I N,Matousek P,Towrie M,Langley A J,Collier J L 1997 Opt.Commun.114 125
[17]	Yoshida H,Ishii E,Kodama R,Fujita H,Kitagawa Y,Izawa Y,Yamanaka T 2003 Opt.Lett.28 257
[18]	Zeng S G,Zhang B,Dan Y Q,Sui Z,Sun N C 2010 Opt.Commun.283 4054
[19]	Wang Z H,Liu,C,Shen Z W,Wei Z Y 2011 Opt.Lett.36 319
[20]	Ren H Y,Qian L J,Zhu H Y 2010 Opt.Exp.218 12948
[21]	Hiromitsu K,Mori M,Yoshiki N 2010 Appl.Opt.49 2105
[22]	Bagnoud V,Zuegel J D,Forget N,Blanc C L 2007 Opt.Exp.15 5504
[23]	Xu Y,Leng Y X,Lin L H,Wang W Y,Huang Y S,Li R X 2010 Chinese Optics Letters 8 123
[24]	Xiao Y Z,Maywar D N,Agrawal G P 2011 JOSAB 28 1685
[25]	Yu J,Yuan S,Gao J Y,Sun L Z 2001 JOSA A 18 2153

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