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提出在CS2/CCl4混合介质液芯光纤中利用多线抽运调制 技术实现带宽可控平顶布里渊增益谱的方法, 理论研究了抽运光谱线间距、谱线强度和芯液介质混合比对布里渊增益谱的影响, 得到了带宽可控平顶增益谱的条件. 结果表明, 采用一个强度或相位调制器, 基于单频和多频调制技术产生2–9条抽运光谱线, 通过控制谱线间距和各谱线强度比, 并改变CS2体积分数, 获得了增益带宽在50 MHz–2 GHz 范围内可控的平顶增益谱. 该方法操作简便、带宽调控范围大, 可用于高增益低畸变布里渊放大, 满足微弱光信号探测和慢光系统的应用需求.We present a method of achieving a flat-top Brillouin gain spectrum (BGS) with a controllable bandwidth based on multiple-lines pump modulation in a CS2/CCl4 mixture liquid-core optical fiber. The influences of the pump spectrum separation, the intensity of each spectrum line, and the mixing ratio of core liquid media on the BGS are theoretically investigated, and the conditions of producing the flat-top BGS with an adjustable bandwidth are obtained. Results show that 2–9 spectral lines are generated based on single-frequency and multifrequency modulation using an intensity or phase modulator. The flat-top BGS with bandwidths of 50 MHz–2 GHz are obtained by controlling spectrum separation, the intensity ratio of each spectral line and CS2 volume fraction. This method has advantages of convenient operation and wide bandwidth range. It can be applied in Brillouin amplification with high gain and low distortion, and hence satisfies the requirements of weak signal detection and slow light systems.
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Keywords:
- stimulated Brillouin scattering /
- Brillouin gain spectrum /
- multiple-lines pump modulation /
- liquid-core optical fiber
[1] Dong Y K, Zhang H Y, Chen L, Bao X Y 2012 Appl. Opt. 51 1229
[2] Zhang L, Zhang D, Shi J L, Shi J W, Gong W P, Liu D H 2012 Appl. Phys. B 109 137
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[5] Wise A, Tur M, Zadok A 2011 Opt. Express 19 21945
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[7] Zhu Z, Dawes A M C, Gauthier D J, Zhang L, Willner A E 2007 J. Lightwave Technol. 25 201
[8] Herr’aez M G, Song K Y, Th’evenaz L 2006 Opt. Express 14 1395
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[10] Ba D X, Lu Z W, Zhu C Y 2011 Academic International Symposium on Optoelectronics and Microelectronics Technology (AISOMT), Harbin, Oct.12-16 2011 p108
[11] Dong Y K, Lu Z W, Li Q, Liu Y F 2008 J. Opt. Soc. Am. B 25 C109
[12] Sakamoto T, Yamamoto T, Shiraki K, Kurashima T 2008 Opt. Express 16 8026
[13] Dong Y K 2008 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [董永康 2008 博士学位论文 (哈尔滨: 哈尔滨工业大学)]
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[15] Kieu K, Schneebeli L, Norwood R A, Peyghambarian N 2012 Opt. Express 20 8148
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[17] Herrera O D, Schneebeli L, Kieu K, Norwood R A, Peyghambarian N 2013 Opt. Express 21 8821
[18] Gao W, Sun D, Bi Y F, Li J Y 2012 Appl. Phys. B 107 355
[19] Gao W, Hu X B, Sun D, Li J Y 2012 Opt. Express 20 20715
[20] Xu Y H 2010 Ph. D. Dissertation (Shanghai: Shanghai Jiao Tong University) (in Chinese) [许永豪 2010 博士学位论文 (上海: 上海交通大学)]
[21] Dai F F, Xu Y H, Chen X F 2010 Chin. Opt. Lett. 8 14
[22] Hasi W L J, Lu Z W, Liu S J, He W M, Zhao X Y, Zhang W 2008 Acta Phys. Sin. 57 2976 (in Chinese) [哈斯乌力吉, 吕志伟, 刘述杰, 何伟明, 赵晓彦, 张伟 2008 57 2976]
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[1] Dong Y K, Zhang H Y, Chen L, Bao X Y 2012 Appl. Opt. 51 1229
[2] Zhang L, Zhang D, Shi J L, Shi J W, Gong W P, Liu D H 2012 Appl. Phys. B 109 137
[3] Hasi W L J, Wang X Y, Guo X Y, Zhong Z M, Fan R Q, Lin D Y, He W M, Lu Z W 2012 Acta Phys. Sin. 61 144207 (in Chinese) [哈斯乌力吉, 王雪阳, 郭翔宇, 仲召明, 范瑞清, 林殿阳, 何伟明, 吕志伟 2012 61 144207]
[4] Liu D H, Shi J W, Chen X D, Ouyang M, Gong W P 2010 Front. Phys. China 5 82
[5] Wise A, Tur M, Zadok A 2011 Opt. Express 19 21945
[6] Lu Z W, Ba D X, Zhu C Y, Dong Y K 2012 Appl. Phys. B 109 55
[7] Zhu Z, Dawes A M C, Gauthier D J, Zhang L, Willner A E 2007 J. Lightwave Technol. 25 201
[8] Herr’aez M G, Song K Y, Th’evenaz L 2006 Opt. Express 14 1395
[9] Lu Z W, Dong Y K, Li Q 2007 Opt. Express 15 1871
[10] Ba D X, Lu Z W, Zhu C Y 2011 Academic International Symposium on Optoelectronics and Microelectronics Technology (AISOMT), Harbin, Oct.12-16 2011 p108
[11] Dong Y K, Lu Z W, Li Q, Liu Y F 2008 J. Opt. Soc. Am. B 25 C109
[12] Sakamoto T, Yamamoto T, Shiraki K, Kurashima T 2008 Opt. Express 16 8026
[13] Dong Y K 2008 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [董永康 2008 博士学位论文 (哈尔滨: 哈尔滨工业大学)]
[14] Kieu K, Schneebeli L, Merzlyak E, Hales J M, Desimone A, Perry J W, Norwood R A, Peyghambarian N 2012 Opt. Lett. 37 942
[15] Kieu K, Schneebeli L, Norwood R A, Peyghambarian N 2012 Opt. Express 20 8148
[16] Kieu K, Churin D, Schneebeli L, Norwood R A, Peyghambarian N 2013 Opt. Lett. 38 543
[17] Herrera O D, Schneebeli L, Kieu K, Norwood R A, Peyghambarian N 2013 Opt. Express 21 8821
[18] Gao W, Sun D, Bi Y F, Li J Y 2012 Appl. Phys. B 107 355
[19] Gao W, Hu X B, Sun D, Li J Y 2012 Opt. Express 20 20715
[20] Xu Y H 2010 Ph. D. Dissertation (Shanghai: Shanghai Jiao Tong University) (in Chinese) [许永豪 2010 博士学位论文 (上海: 上海交通大学)]
[21] Dai F F, Xu Y H, Chen X F 2010 Chin. Opt. Lett. 8 14
[22] Hasi W L J, Lu Z W, Liu S J, He W M, Zhao X Y, Zhang W 2008 Acta Phys. Sin. 57 2976 (in Chinese) [哈斯乌力吉, 吕志伟, 刘述杰, 何伟明, 赵晓彦, 张伟 2008 57 2976]
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