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基于增强瑞利反馈的单模窄线宽随机激光器

李阳 刘艳 刘志波 简水生

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基于增强瑞利反馈的单模窄线宽随机激光器

李阳, 刘艳, 刘志波, 简水生

Single-mode narrow linewidth random fiber laser with enhanced feedback from Rayleigh scattering

Li Yang, Liu Yan, Liu Zhi-Bo, Jian Shui-Sheng
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  • 仿真说明了单模光纤(SMF)中瑞利散射(RS)的机理, 指出纤芯掺杂的不均匀性以及拉丝过程引起的光纤几何尺寸的随机变化是光纤中RS产生的主要原因, 并以此为基础制作了损耗为0.54 dB/km的散射光纤. 在通信波段, 5 km该散射光纤的瑞利背向散射(RBS)强度高于相同长度的SMF-28近5 dB. 在基于RBS单模随机激光器的数值模拟中, 大量的具有随机幅度和相位的纵模在经历不平坦增益的多次放大之后, 只有在增益最大点附近的模式能够克服损耗成为输出模式. 实验中以掺铒光纤作为增益介质, 500 m散射光纤提供随机反馈, 窄带布拉格光纤光栅(FBG)作为波长选择器件, 得到线宽约3.5 kHz、对比度近50 dB的单模激光输出. 与采用相同长度SMF-28的随机激光器相比, 其阈值电流降低了80 mA, 相同抽运条件下的最大输出功率提高了3 dBm. 该单模窄线宽随机激光器的输出波长的调谐特性仅由FBG的中心波长决定.
    The origin of Rayleigh scattering in fiber waveguides is numerically demonstrated, which indicates that the inhomogeneous doping and diameter variations during drawing are the two dominant reasons. And the scattering fiber with a loss as high as 0.54 dB/km is successfully fabricated based on such principles. The overall Rayleigh backscattering intensity of 5 km scattering fiber is 5 dB higher than that of SMF-28 with the same length in telecommunication window. The principle of single-mode random fiber laser is also studied. The emission spectrum is the superposition of a large number of random modes with arbitrary amplitudes and phases, among which only the highest gain modes can lasing through gain competition. In experiment, a single-mode erbium-doped fiber linear laser with a narrow linewidth of 3.5 kHz and a high contrast of 50 dB is achieved by combining with 500 m scattering fiber as the random feedback. The threshold pump current is reduced by 80 mA and the max output power is increased by 3 dBm for the proposed laser compared with those of the laser with 500 m SMF-28 as the feedback. The tunabiltiy of the proposed laser is determined mainly by the fiber Bragg grating.
    • 基金项目: 国家重点基础研究发展计划(批准号: 2010CB328206)、国家自然基金重点项目(批准号: 60837002)、中央高等学校基本科研业务费专项资金(批准号: 2013JBM005)和北京市高等学校青年英才计划(批准号: YETP0530)资助的课题.
    • Funds: Project supported by the National Basic Research Program of China (Grant No. 2010CB328206), the Key Program of the National Natural Science Foundation of China (Grant No. 60837002), the Fundamental Research Funds for the Central Universities, China (Grant No. 2013JBM005), and the Beijing Higher Education Young Elite Teacher Project, China (Grant No. YETP0530).
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    Yin G L, Saxena B, Bao X Y 2011 Opt. Express 19 25981

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    Lizárraga N, Puente N P, Chaikina E I, Leskova T A, Méndez E R 2009 Opt. Express 17 395

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  • [1]

    Wang K J, Liu J S, L J T 2006 Acta Phys. Sin. 55 3906 (in Chinese) [王可嘉, 刘劲松, 吕健滔 2006 物理学报 55 3906]

    [2]

    Xu Y, Li Y P, Jin L, Ma X Y, Yang D R 2013 Acta Phys. Sin. 62 084207 (in Chinese) [徐韵, 李云鹏, 金璐, 马向阳, 杨德仁 2013 物理学报 62 084207]

    [3]

    Christiano J S M, Leonardo S M, Antônio M B, Martinez M A G, Anderson S L G, Cid B A 2007 Phys. Rev. Lett. 99 153903

    [4]

    Wang H Q, Gong Q H 2013 Acta Phys. Sin. 62 214202 (in Chinese) [王慧琴, 龚旗煌 2013 物理学报 62 214202]

    [5]

    Hu Z J, Miao B, Wang T X, Fu Q, Zhang D G, Ming H, Zhang Q J 2013 Opt. Lett. 38 4644

    [6]

    Hu Z J, Zhang Q, Miao B, Fu Q, Zou G, Chen Y, Luo Y, Zhang D G, Wang P, Ming H, Zhang Q J 2012 Phys. Rev. Lett. 109 253901

    [7]

    Turitsyn S K, Babin S A, EI-Taher A E, Harper P, Churkin D V, Kavlukov S I, Ania-Castañón J D, Karalekas V, Podivilov E V 2010 Nat. Photon. 4 231

    [8]

    Fotiadi A A 2010 Nat. Photon. 4 204

    [9]

    Churkin D V, EI-Taher A E, Vatnik I D, Ania-Castañón J D, Harper P, Podivilov E V, Babin S A, Turitsyn S K 2012 Opt. Express 20 11178

    [10]

    Smirnov S V, Churkin D V 2013 Opt. Express 21 21236

    [11]

    Zhang W L, Rao Y J, Zhu J M, Yang Z X, Wang Z N, Jia H X 2012 Opt. Express 20 14400

    [12]

    Yin G L, Saxena B, Bao X Y 2011 Opt. Express 19 25981

    [13]

    Zhu T, Bao X Y, Chen L 2011 J. Lightwave Technol. 29 1802

    [14]

    Saxena B, Bao X Y, Chen L 2014 Opt. Lett. 39 1038

    [15]

    Pang M, Bao X Y, Chen L, Qin Z G, Lu Y, Lu P 2013 Opt. Express 21 27155

    [16]

    Pang M, Bao X Y, Chen L 2013 Opt. Lett. 38 1866

    [17]

    Pang M, Xie S R, Bao X Y, Zhou D P, Lu Y G, Chen L 2012 Opt. Lett. 37 3129

    [18]

    Puente N P, Chaikina E I, Herath S, Yamilov A 2011 Appl. Opt. 50 802

    [19]

    Gagné M, Kashyap R 2009 Opt. Express 17 19067

    [20]

    Lizárraga N, Puente N P, Chaikina E I, Leskova T A, Méndez E R 2009 Opt. Express 17 395

    [21]

    Gagné M, Kashyap R 2014 Opt. Lett. 39 2755

    [22]

    Zhu T, Chen F Y, Huang S H, Bao X Y 2013 Laser Phys. Lett. 10 055110

    [23]

    Li Y, Lu P, Bao X Y, Ou Z H 2014 Opt. Lett. 39 2294

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  • 被引次数: 0
出版历程
  • 收稿日期:  2014-09-21
  • 修回日期:  2014-10-20
  • 刊出日期:  2015-04-05

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