光纤光栅对的参数匹配与激光输出特性
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摘要
高功率光纤激光器的激光输出特性优化,对进一步提高光纤激光器的输出功率以及实际应用中的切割、加工质量具有重要意义.斜率效率、背向漏光以及受激拉曼散射是高功率光纤激光器设计中较为关心的输出特性参数.作为核心器件,光纤光栅对的参数设计与匹配,会直接影响到整个激光系统的性能.本文旨在探究光纤光栅对的参数匹配对激光输出特性的影响,先是通过理论分析分别阐述了斜率效率、背向漏光以及受激拉曼散射的来源与相互关系;然后通过实验设计,采取了两组不同参数光纤光栅对组合,从实验上分别探究了低反光纤光栅的光谱带宽以及反射率对激光输出特性的影响.最后得出了光纤光栅对的优化参数与匹配原则,为提高连续光纤激光器的激光输出特性提供了理论支持与参考价值.
In order to improve the output power and processing quality in industrial applications, it is important to optimize the output characteristics of the high-power fiber lasers. The slope efficiency, backward leaking power and stimulated Raman scattering are key issues in high-power fiber laser design. The parameters matching the fiber gratings, which are the critical components, have a direct influence on the whole fiber laser system. In this paper, the parameters matching the fiber gratings in fiber lasers are investigated. Firstly, the origin of slope efficiency, backward leaking power and stimulated Raman scattering are analyzed in theory. Then the influences on output characteristics of fiber lasers comprised of the output coupler gratings, which have different bandwidths and reflectivities, are experimentally studied. Finally, the optimized parameters and matching principle of fiber gratings in high-power fiber laser are obtained, thus providing an alternative method to improve the output characteristics of high-power continuous wave fiber laser.
In order to improve the output power and processing quality in industrial applications, it is important to optimize the output characteristics of the high-power fiber lasers. The slope efficiency, backward leaking power and stimulated Raman scattering are key issues in high-power fiber laser design. The parameters matching the fiber gratings, which are the critical components, have a direct influence on the whole fiber laser system. In this paper, the parameters matching the fiber gratings in fiber lasers are investigated. Firstly, the origin of slope efficiency, backward leaking power and stimulated Raman scattering are analyzed in theory. Then the influences on output characteristics of fiber lasers comprised of the output coupler gratings, which have different bandwidths and reflectivities, are experimentally studied. Finally, the optimized parameters and matching principle of fiber gratings in high-power fiber laser are obtained, thus providing an alternative method to improve the output characteristics of high-power continuous wave fiber laser.
引文
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[18]Xiao H,Leng J Y,Zhang H W,Huang L J,Xu J M,Zhou P2015 Appl.Opt.54 27
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[22]Xu H Y,Jiang M,Shi C,Zhou P,Zhao G M,Gu X J 2017Appl.Opt.56 12
[23]Liem A,Freier E,Matzdorf C,Reichel V,Schreiber T,Eberhardt R,Tunnermann A 2013 Advanced Solid-State Lasers Congress Technical Digest Paris,France,October 27-November 1,2013 JTh2A.32
[24]Ido K,Amos A H 1998 IEEE J.Quantum Electron.34 9
[25]Wang W C,Li L X,Chen D D,Zhang Q Y 2016 Sci.Rep.631761
[26]Li Y H,Yang M W,Wang D N,Lu J,Sun T,Grattan K T V2009 Opt.Express 17 22
[2]Duarte FJ 2009 Tunable Laser Applications(2nd Ed.)(Boca Raton:CRC Press)pp1-14
[3]Hashemzaden M,Suder W,Williams S,Powell J,Kaplan A FH,Voisey K T 2014 Phys.Procedia 56 909
[4]Zervas M N 2014 Int.J.Mod.Phys.B 28 12
[5]Zhou H,Chen Z,Zhou X,Hou J,Chen J 2015 Opt.Commun.347 137
[6]Holehouse N,Magne J,Auger M,Quebec M 2015 Proc.SPIE9344 93441F
[7]Jeong Y,Sahu J K,Payne D N 2004 Opt.Express 12 25
[8]IPG Photonics successfully tests world’s first 10 kilowatt single-mode producion laser.http://www.ipgphotonics.com[2009-6-16]
[9]NukW:Kilowatt laser ampifier platform http://www.nufern.com[2012-4-12]
[10]Zhou J,Lou Q H,Zhu J Q 2006 Acta Opt.Sin.26 1119(in Chinese)[周军,楼祺洪,朱健强2006光学学报26 1119]
[11]Li C,Yan P,Chen G 2006 Chinese Journal of Lasers 33 738(in Chinese)[李晨,闫平,陈刚2006中国激光33 738]
[12]Li W,Wu Z C,Chen X 2006 High Power Laser and Particle Beams 18 890(in Chinese)[李伟,武子淳,陈曦2006强激光与粒子束18 890]
[13]Lou Q H,He B,Xue Y H 2009 Chinese Journal of Lasers 361277(in Chinese)[楼祺洪,何兵,薛宇豪2009中国激光361277]
[14]Ren Y J 2012 M.S.Thesis(Changsha:National University of Defense Technology)(in Chinese)[任亚杰2012硕士学位论文(长沙:国防科技大学)]
[15]Zhan H,Liu Q Y,Wang Y Y,Ke W W,Ni L,Wang X L,Peng K,Gao C,Li Y W,Lin H H,Wang J J,Jing F,Lin A X 2016 Opt.Express 24 24
[16]Raman K 2010 Fiber Bragg Gratings(2nd Ed.)(USA:Academic Press)pp119-180
[17]Wang J H,Chen G,Zhang L,Hu J M,Li J Y,He B,Chen JB,Gu X J,Zhou J,Feng Y 2012 Appl.Opt.51 29
[18]Xiao H,Leng J Y,Zhang H W,Huang L J,Xu J M,Zhou P2015 Appl.Opt.54 27
[19]Agrawal G P 1995 Nonlinear Fiber Optics(USA:Academic Press)p300
[20]Schreiber T,Liem A,Freier E,Matzdorf C,Eberhardt R,Jauregui C,Limpert J,Tunnermann A 2018 Proc.SPIE 896189611T-1
[21]Tao R M,Xiao H,Zhang H W,Leng J Y,Wang X L,Zhou P,Xu X J 2018 Opt.Express 26 19
[22]Xu H Y,Jiang M,Shi C,Zhou P,Zhao G M,Gu X J 2017Appl.Opt.56 12
[23]Liem A,Freier E,Matzdorf C,Reichel V,Schreiber T,Eberhardt R,Tunnermann A 2013 Advanced Solid-State Lasers Congress Technical Digest Paris,France,October 27-November 1,2013 JTh2A.32
[24]Ido K,Amos A H 1998 IEEE J.Quantum Electron.34 9
[25]Wang W C,Li L X,Chen D D,Zhang Q Y 2016 Sci.Rep.631761
[26]Li Y H,Yang M W,Wang D N,Lu J,Sun T,Grattan K T V2009 Opt.Express 17 22