主动调Q掺镱光纤激光器中放大自发辐射影响的研究

实验研究了主动调Q掺镱光纤激光器(YDFL)中放大自发辐射(ASE)对调Q脉冲形成和演化的影响。结果表明,尾纤型声光调制器(AOM)打开过快和掺镜光纤(YDF)增益瞬态特性间的综合相互作用结果,使得注入至腔内的初始宽带ASE形成功率波动,并在腔内循环放大,导致输出脉冲呈多峰结构;而注入的宽带ASE因功率过高会导致YDF的增益自饱和效应,制约高增益的获取,使激光器难以获得调Q激光脉冲,输出脉冲主要为调Q的ASE脉冲;通过引入光纤布拉格光栅(FBG),可以有效抑制YDF中因ASE产生的增益饱和效应,YDF工作在高增益状态,有利于获得低阈值、窄脉宽和高峰值功率的调Q激光脉冲。引入FBG后,在160 mW抽运时,实验测得的调Q激光脉冲峰值功率和脉宽分别为40.7 W和30 ns。

Abstract

The influences of amplified spontaneous emission (ASE) on the formation and evolution of pulses in actively Q-switched ytterbium-doped fiber laser (YDFL) are investigated experimentally. The experimental results show that the combined effect between the short switching time and the gain transient property of ytterbium-doped fiber (YDF) causes the initial ASE power fluctuation,which then forms the multi-peak structure in the output pulse after having been circulated and amplified in the cavity. Meanwhile,the high-level broadband ASE may give rise to the gain self-saturation effect in the YDF,making it difficult to form Q-switched laser pulses for the fiber laser. The output pulses may be eventually Q-switched ASE pulses,giving lower peak-power and larger pulse duration. By using fiber Bragg grating (FBG) to suppress the gain self-saturation effect,the gain supplied by the YDF can be greatly enhanced,making it easy for the laser to achieve the Q-switched laser pulse with low threshold,small duration,and high peak-power. When the YDFL with FBG is pumped with 160 mW,the Q-switched laser pulses with the peak power of 40.7 W and the duration of 30 ns are achieved.

参考文献

[1] . C. Renaud,R. J. Selvas-Aguilar,C. J. Nilsson et al.. Compact high-energy Q-switched cladding-pumped fiber laser with a tuning range over 40 nm[J]. IEEE Photon. Technol. Lett., 1999, 11(8): 976-978.

[2] . A. Alvarez-Chavez,H. L. Offerhaus,C. J. Nilsson et al.. High-energy,high power ytterbium-doped Q-switched fiber laser[J]. Opt. Lett., 2000, 25(1): 37-39.

[3] . C. Renaud,H. L. Offerhaus,J. A. Alvarez-Chavez et al.. Characteristics of Q-switched cladding-pumped ytterbium-doped fiber laser with different high energy fiber designs[J]. IEEE J. Quantum Electron., 2001, 37(2): 199-206.

[4] . M. Zhao,Q. H. Lou,J. Zhou et al.. High-repetition-rate MHz acousto-optic switched fiber laser[J]. IEEE Photon. Technol. Lett., 2008, 20(12): 1009-1012.

[5] 邢磊,冯雪,张磊等. 受激布里渊散射主被动混合调Q光纤激光器[J]. 中国激光,2008,35(3):338-342

Xing Lei,Feng Xue,Zhang Lei et al.. Stimulated Brillouin scattering hybrid Q-switched Er-doped fiber laser [J]. Chinese J. Lasers,2008,35(3):338-342

[6] 高存孝,赵卫,王屹山等. 掺Yb3+全光纤环形腔主动调Q光纤激光器[J]. 中国激光,2008,35(5):651-654

Gao Cunxiao,Zhao Wei,Wang Yishan et al.. Actively Q-switched Yb3+-doped all fiber ring laser [J]. Chinese J. Lasers,2008,35(5):651-654

[7] Bo Peng,Qiang Liu,Mali Gong et al.. Acousto-optic Q-switched cladding-pumped ytterbium-doped fiber laser [J]. Chin. Opt. Lett.,2007,5(7):415-417

[8] . Adachi,Y. Koyamada. Analysis and design of Q-switched erbium-doped fiber lasers and their application to OTDR[J]. J. Lightwave Technol., 2002, 20(8): 1506-1511.

[9] . Myslinski,J. Chrostowski,J. A. K. Koningstein et al.. Self-mode locking in a Q-switched erbium-doped fiber laser[J]. Appl. Opt., 1993, 32(3): 286-290.

[10] . Wang,C. Q. Xu. Understanding multipeak phenomena in actively Q-switched fiber lasers[J]. Opt. Lett., 2004, 29(10): 1060-1062.

[11] . Wang,C. Q. Xu. Switching-induced perturbation and influence on actively Q-switched fiber lasers[J]. IEEE J. Quantum Electron., 2004, 40(11): 1583-1596.

[12] Y. Wang,A. Martinez-Rios,Hong Po. Analysis of a Q-switched ytterbium-doped double-clad fiber laser with simultaneous mode locking [J]. Opt. Commun.,2003,224(1-3):113-123

[13] E. Desurvire,D. Bayart,B. Desthieux et al.. Erbium-Doped Fiber Amplifiers,Devices and System Developments [M]. New York:John Willey and Sons Inc.,2002

[14] . 利用偏振控制器连续调节光纤环镜的反射率[J]. 物理学报, 2007, 56(8): 4677-4685.

. Continuously adjusting the reflectivity of fiber loop mirror using a polarization controller[J]. Acta Physica Sinica, 2007, 56(8): 4677-4685.

[15] . R. Giles,E. Desurvire,J. R. Simpson. Transient gain and cross talk in erbium-doped fiber amplifiers[J]. Opt. Lett., 1989, 14(16): 880-882.

[16] . Y. Lit. Optical bistability in an L-band dual-wavelength erbium-doped fiber laser with overlapping cavities[J]. IEEE Photon. Technol. Lett., 2002, 14(9): 1252-1254.

陈晓东, 孙青, 赵佳生, 冯素娟, 毛庆和. 主动调Q掺镱光纤激光器中放大自发辐射影响的研究[J]. 中国激光, 2010, 37(8): 1929. Chen Xiaodong, Sun Qing, Zhao Jiasheng, Feng Sujuan, Mao Qinghe. Study on Influences of Amplified Spontaneous Emission on Actively Q-Switched Ytterbium-Doped Fiber Laser[J]. Chinese Journal of Lasers, 2010, 37(8): 1929.

主动调Q掺镱光纤激光器中放大自发辐射影响的研究

关于本站 Cookie 的使用提示

全站搜索

主动调Q掺镱光纤激光器中放大自发辐射影响的研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索