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对光纤激光极限功率的探索和其受限因素的分析, 有利于为大功率光纤激光器的发展提供理论依据和实验指导. 本文考虑热效应、光效应、非线性效应和抽运亮度等因素对光纤激光极限功率的影响, 分析了掺镱和掺铥光纤的极限功率和受限因素. 在此基础上, 结合激光在光纤中单模传输的条件, 计算了单模掺镱和掺铥光纤激光的极限功率. 计算结果表明, 在现有技术条件下, 使用常规的976 nm和793 nm激光二极管抽运, 单模掺镱和掺铥光纤激光的极限功率分别为4.2 kW和7.8 kW, 其中单模掺铥光纤激光的功率水平还远低于它的极限功率的原因是受抽运亮度的限制. 最后分析指出减小纤芯的数值孔径和改进少模光束的光束质量是提升单模光纤激光极限功率的重要途径.Study on power limit of fiber lasers and analysis of their physical limits are helpful to develop high power fiber lasers both in theory and in experiment. In this paper, power limits and physical limits of ytterbium-doped and thulium-doped fiber lasers are analyzed by considering several limits to the power scalability of fiber laser, including thermal effect, optical effect, nonlinear effect and the brightness of pump source. Then combining these considerations with the basic requirement for single-mode fiber, the power limits of single-mode ytterbium-doped and thulium-doped fiber lasers are calculated. It is found that using traditional 976 nm and 793 nm laser diodes, separately, as a pump source, based on current technical conditions, power limits of single-mode ytterbium-doped and thulium-doped fiber lasers are 4.2 kW and 7.8 kW, respectively. It is concluded that the fact that the actual power presented by the single-mode thulium-doped fiber laser is much lower than its limit power is due to the pump brightness limitation. Finally the principal approaches to enhancing power limits of single-mode fiber lasers are summarized, including reducing numerical aperture of fiber core and improving beam quality of few-mode fiber lasers.
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Keywords:
- single-mode fiber laser /
- power limit /
- ytterbium-doped fiber laser /
- thulium-doped fiber laser
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[51] -
[1] Hayward R A, Clarkson W A, Turner P W, Nilsson J, Grudinin A B, Hanna D C 2000 Electronics Letters 36 711
[2] [3] Limpert J, Liem A, Zellmer H, Tnnermann A 2003 Electronics Letters 39 645
[4] [5] Zhou J, Lou Q H, Kong L F, Wu Z L, Xue D, Dong J X, Wei Y R, Ye Z H, Zhu J Q, Wang Z J 2004 Chin. Phys. Lett. 21 1083
[6] [7] Zhou J, Lou Q H, Zhu J Q, He B, Dong J X, Wei Y R, Zhang F P, Li J Y, Li S Y, Zhao H M, Wang Z J 2006 Acta Optica Sinica 26 1119 (in Chinese) [周 军, 楼祺洪, 朱健强, 何兵, 董景星, 魏运荣, 张芳沛, 李进延, 李诗愈, 赵宏明, 王之江 2006 光学学报 26 1119]
[8] Jeong Y, Nilsson J, Sahu J K, Payne D N, Horley R, Hickey L M B, Turner P W 2007 IEEE J. Sel. Top. Quantum Electron 13 546
[9] [10] Gregory D, Goodno, Lewis D, Book, Joshua E, Rothenberg 2009 Opt. Lett. 34 1204
[11] [12] [13] Jeong Y, Sahu J K, Payne D N, Nilsson J 2004 Opt. Express 12 6088
[14] Ehrenreich T, Leveille R, Majid I, Tankala K 2010 SPIE Photonics West 2010 January 28 2010
[15] [16] [17] Zhu H T, Lou Qi H, Zhou J, Qi Y F, Dong J X,Wei Y R 2008 Acta Phys. Sin. 57 4966 (in Chinese) [朱洪涛, 楼祺洪, 周军, 漆云凤, 董景星, 魏运荣 2008 bf 57 4966]
[18] Qi Y F, Liu C, Zhou J, Chen W B, Dong J X, Wei Y R, Lou Q H 2010 Acta Phys. Sin. 59 3942 (in Chinese) [漆云凤, 刘驰, 周军, 陈卫标, 董景星, 魏运荣, 楼祺洪 2010 59 3942]
[19] [20] [21] Wang X L, Zhou P, Ma Y X, Ma H T, Xu X J, Liu Z J, Zhao Y J 2010 Acta Phys. Sin. 59 973 (in Chinese) [王小林, 周朴, 马阎星, 马浩统, 许晓军, 刘泽金, 赵伊君 2010 59 973]
[22] Ma Y X, Wang X L, Leng J Y, Xiao H, Dong X L, Zhu J J, Du W B, Zhou P, Xu X J, Si L, Liu Z J, Zhao Y J 2011 Opt. Lett. 36 951
[23] [24] [25] Fomin V, Abramov M, Ferin A, Abramov A, Mochalov1 D, Platonov N, Gapontsev V 2010 5th International Symposium on High-Power Fiber Lasers and Their Applications St. Petersburg June 28July 1, 2010
[26] Dawson J W, Messerly M J, Beach R J, Shverdin M Y, Stappaerts E A, Sridharan A K, Pax P H, Heebner J E, Siders C W, Barty C P J 2008 Opt. Express 16 13240
[27] [28] Zhou P, Ma Y X, Wang X L, Ma H T, Xu X J, Liu Z J 2009 Opt Lett. 34 2939
[29] [30] Codemard C A, Sahu J K, Nilsson J 2010 IEEE Journal of Quantum Electronics 46 1860
[31] [32] [33] Richardson D J, Nilsson J, Clarkson W A 2010 J. Opt. Soc. Am. B 27 65
[34] Zhou P, Wang X, Ma Y, Tao R, Liu Z 2011 Appl. Phys. B DOI 10.1007/s00340-011-4491-6
[35] [36] [37] Dawson J W, Messerly M J, Heebner J E, Paxa P H, Sridharana A K, Bullingtona A L, Beacha R J, Sidersa C W, Bartya C P J, Dubinskiib M 2010 Proc. of SPIE Laser Technology for Defense and Security Orlando, Florida April 5 2010 p788611-2
[38] Xue D, Zhou J, Lou Q H, Shuai M D 2009 High Power Laser and Particle Beams 21 1013 (in Chinese) [薛冬, 周军, 楼祺洪, 帅敏东 2009 强激光与粒子束 21 1013]
[39] [40] [41] Moulton P F, Rines G A, Slobodtchikov E V, Wall K F, Gavin F, Bryce S, Carter A L G 2009 IEEE J. Sel. Top. Quantum Electron 15 85
[42] [43] Liu A P 2007 Opt. Express 15 978
[44] [45] Jeong Y, Boyland A J, Sahu J K, Chung S, Nilsson J, Payne D H 2009 Journal of the Optical Society of Korea 13 416
[46] Meleshkevich M, Platonov N, Gapontsev D, Drozhzhin A 2007 Lasers and Electro-Optics, and the International Quantum Electronics Conference Munich, June 1722, 2007 p1
[47] [48] Han K, Ma Y X, Wang X L, Zhou P, Xu X J, Liu Z J 2010 Laser Optoelectronics Progres. 47 101406-1 (in Chinese) [韩凯, 马阎星, 王林, 周朴, 许晓军, 刘泽金 2010 激光与光电子进展 47 101406-1]
[49] [50] Lou Q H, Zhou J, Zhang H B, Yuan Z J 2010 Chinese Journal of Lasers 37 2235 (in Chinese) [楼祺洪, 周军, 张海波, 袁志军 2010 中国激光 37 2235]
[51]
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