留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Intensity noise as a driver for transverse mode instability in fiber amplifiers

Christoph Stihler Cesar Jauregui Sobhy E. Kholaif Jens Limpert

Christoph Stihler, Cesar Jauregui, Sobhy E. Kholaif, Jens Limpert. Intensity noise as a driver for transverse mode instability in fiber amplifiers[J]. PhotoniX. doi: 10.1186/s43074-020-00008-8
引用本文: Christoph Stihler, Cesar Jauregui, Sobhy E. Kholaif, Jens Limpert. Intensity noise as a driver for transverse mode instability in fiber amplifiers[J]. PhotoniX. doi: 10.1186/s43074-020-00008-8
Christoph Stihler, Cesar Jauregui, Sobhy E. Kholaif, Jens Limpert. Intensity noise as a driver for transverse mode instability in fiber amplifiers[J]. PhotoniX. doi: 10.1186/s43074-020-00008-8
Citation: Christoph Stihler, Cesar Jauregui, Sobhy E. Kholaif, Jens Limpert. Intensity noise as a driver for transverse mode instability in fiber amplifiers[J]. PhotoniX. doi: 10.1186/s43074-020-00008-8

Intensity noise as a driver for transverse mode instability in fiber amplifiers

doi: 10.1186/s43074-020-00008-8
基金项目: 

Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-416342637

416342891

GRK 2101 (259607349). Fraunhofer Gesellschaft-Fraunhofer Cluster of Excellence "Advanced Photon Sources".

Intensity noise as a driver for transverse mode instability in fiber amplifiers

Funds: 

Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-416342637

416342891

GRK 2101 (259607349). Fraunhofer Gesellschaft-Fraunhofer Cluster of Excellence "Advanced Photon Sources".

  • 摘要: The effect of transverse mode instability (TMI) is currently the main limitation for the further average-power scaling of fiber laser systems with diffraction-limited beam quality. In this work a main driving force for TMI in fiber amplifiers is identified. Our experiments and simulations illustrate that the performance of fiber laser systems in terms of their diffraction-limited output power can be significantly reduced when the pump or seed radiation exhibit intensity noise. This finding emphasizes the fact that the TMI threshold is not only determined by the active fiber but, rather, by the whole system. In the experiment an artificially applied pump intensity-noise of 2.9% led to a reduction of the TMI threshold of 63%, whereas a similar seed intensitynoise decreased it by just 13%. Thus, even though both noise sources have an impact on the TMI threshold, the pump intensity-noise can be considered as the main driver for TMI in saturated fiber amplifiers. Additionally, the work unveils that the physical origin of this behavior is linked to the noise transfer function in saturated fiber amplifiers. With the gained knowledge and the experimental and theoretical results, it can be concluded that a suppression of pump-noise frequencies below 20 kHz could strongly increase the TMI threshold in high-power fiber laser systems.
      关键词:
    •  / 
    •  / 
    •  / 
    •  / 
    •  / 
    •  / 
    •  / 
    •  
  • [1] Jauregui C, Limpert J, Tünnermann A. High-power fibre lasers. Nat Photonics. 2013;7:861–7.
    [2] Zervas MN, Codemard CA. High power fiber lasers: a review. IEEE J Sel Top Quantum Electron. 2014;20:1–23.
    [3] Eidam T, Hanf S, Seise E, et al. Femtosecond fiber CPA system emitting 830 W average output power. Opt Lett. 2010;35:94–6.
    [4] Eidam T, Wirth C, Jauregui C, et al. Experimental observations of the threshold-like onset of mode instabilities in high power fiber amplifiers. Opt Express. 2011;19:13218–24.
    [5] Otto H-J, Stutzki F, Jansen F, et al. Temporal dynamics of mode instabilities in high-power fiber lasers and amplifiers. Opt Express. 2012;20:15710.
    [6] Jauregui C, Eidam T, Limpert J, Tünnermann A. Impact of modal interference on the beam quality of high-power fiber amplifiers. Opt Express. 2011;19:3258–71.
    [7] Erdogan T. Fiber grating spectra. J Lightwave Technol. 1997;15:1277–94.
    [8] Smith AV, Smith JJ. Mode instability in high power fiber amplifiers. Opt Express. 2011;19:10180–92.
    [9] Stihler C, Jauregui C, Tünnermann A, Limpert J. Phase-shift evolution of the thermally-induced refractive index grating in high-power fiber laser systems induced by pump-power variations. Opt Express. 2018;26:19489–97.
    [10] Stihler C, Jauregui C, Tünnermann A, Limpert J. Modal energy transfer by thermally induced refractive index gratings in Yb-doped fibers. Light Sci Appl. 2018;7:59.
    [11] Smith AV, Smith JJ. Influence of pump and seed modulation on the mode instability thresholds of fiber amplifiers. Opt Express. 2012;20:24545–58.
    [12] Naderi S, Dajani I, Madden T, Robin C. Investigations of modal instabilities in fiber amplifiers through detailed numerical simulations. Opt Express. 2013;21:16111–29.
    [13] Hansen KR, Alkeskjold TT, Broeng J, Lægsgaard J. Theoretical analysis of mode instability in high-power fiber amplifiers. Opt Express. 2013;21:1944–71.
    [14] Tao R, Wang X, Zhou P. Comprehensive theoretical study of mode instability in high-power fiber lasers by employing a universal model and its implications. IEEE J Sel Top Quantum Electron. 2018;24:1–19.
    [15] Limpert J, Stutzki F, Jansen F, et al. Yb-doped large-pitch fibres: effective single-mode operation based on higher-order mode delocalisation. Light Sci Appl. 2012;1:e8.
    [16] Beier F, Möller F, Sattler B, et al. Experimental investigations on the TMI thresholds of low-NA Yb-doped single-mode fibers. Opt Lett. 2018;43:1291.
    [17] Johansen MM, Laurila M, Maack MD, et al. Frequency resolved transverse mode instability in rod fiber amplifiers. Opt Express. 2013;21:21847–56.
    [18] Ward B, Robin C, Dajani I. Origin of thermal modal instabilities in large mode area fiber amplifiers. Opt Express. 2012;20:11407–22.
    [19] Jauregui C, Stihler C, Tünnermann A, Limpert J. Pump-modulation-induced beam stabilization in high-power fiber laser systems above the mode instability threshold. Opt Express. 2018;26:10691–704.
    [20] Novak S, Moesle A. Analytic model for gain modulation in EDFAs. J Lightwave Technol. 2002;20:975–85.
    [21] Tröbs M, Weßels P, Fallnich C. Power- and frequency-noise characteristics of an Yb-doped fiber amplifier and actuators for stabilization. Opt Express. 2005;13:2224.
    [22] Tünnermann H, Neumann J, Kracht D, Weßels P. Gain dynamics and refractive index changes in fiber amplifiers: a frequency domain approach. Opt Express. 2012;20:13539–50.
    [23] Steinke M, Neumann J, Kracht D, Wessels P. Gain dynamics in Er^3+:Yb^3+ co-doped fiber amplifiers. Opt Express. 2015;23:14946.
    [24] Zhao J, Guiraud G, Floissat F, et al. Gain dynamics of clad-pumped Yb-fiber amplifier and intensity noise control. Opt Express. 2017;25:357.
    [25] Jauregui C, Müller M, Kienel M, et al. Optimizing the noise characteristics of high-power fiber laser systems. Proc SPIE. 2017;10083:100830W.
    [26] Gierschke P, Jauregui C, Gottschall T, Limpert J. Relative amplitude noise transfer function of an Yb 3+ −doped fiber amplifier chain. Opt Express. 2019;27:17041.
  • 加载中
计量
  • 文章访问数:  159
  • HTML全文浏览量:  4
  • PDF下载量:  11
  • 被引次数: 0
出版历程
  • 收稿日期:  2019-11-29
  • 录用日期:  2020-02-10
  • 网络出版日期:  2020-03-10

目录

    /

    返回文章
    返回