全光纤电光主动调Q激光器

利用Mach-Zehnder (M-Z)结构的尾纤型铌酸锂(LiNbO3)电光强度调制器作为主动调Q开关元件,采用974nm半导体激光器作为泵浦源,峰值吸收系数为110 dB/m的掺杂铒光纤作为增益介质,实现了1550 nm波长的全光纤主动调Q激光器。通过电光强度调制器对腔内损耗进行了周期性调制,实现Q开关作用, 获得了稳定的调Q脉冲输出。通过改变泵浦功率和调制频率研究了脉冲宽度和峰值功率的变化规律,调制频率在50 Hz～88 kHz内调整时可以得到稳定输出脉冲。调制频率为1 kHz时获得最窄脉冲宽度246 ns, 峰值功率近5 W。

Abstract

The fiber-pigtailed LiNbO3 electro-optical modulator with Mach-Zehnder(M-Z) structure is used as the active Q switching element. The all fiber active Q-switched laser at 1550 nm is realized with 974 nm diode laser as pump source and Yb-doped fiber with 110 dB/m peak absorption coefficient as gain medium. The periodic modulation of cavity loss is carried out with electro-optic intensity modulator. Q-switching action is realized and the stable Q-switched pulse output is obtained. The change laws of pulse width and peak power are investigated by changing pump power and modulation frequency. The stable output pulse can be obtained when the modulation frequency is adjusted from 50 Hz to 88 kHz. The most narrow pulse width of 246 ns and peak power about 5 W are obtained when the modulation frequency is 1 kHz.

参考文献

[1] Ma Mingjun, Ye Bing, Ma Xiaomin. Electro-optically Q-switched 2.94 μm Er:YAG laser and its applications[J]. Chinese Journal of Quantum Electronics (量子电子学报), 2010, 27(6): 688-692 (in Chinese).

[2] Wei Haobo, Guo Qiang, et al. Characterization of Er3+ 2.79 μm rotating mirror Q-switched laser[J]. Chinese Journal of Quantum Electronics (量子电子学报), 2014, 31(5): 563-568 (in Chinese).

[3] Dong Lianyong, Sun Liping, Zhang Zhiqin. The development of all fiber Q-switched laser[J]. Laser and Infrared (激光与红外), 2006, 3(6): 423-42（in Chinese).

[4] Shang Lianju, Yang Xiuqin, Ma Rende. Review of actively Q-switched all-fiber lasers[J]. Laser Technology (激光技术), 2012, 3(2): 170-173 (in Chinese).

[5] Williams R J, Jovanovic N, Marshall G D, et al. All-optical, actively Q-switched fiber laser[J]. Optics Express, 2010, 18(8): 7714-7723.

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

[7] Guo Wengang, Li Enbang, Lv Fuyun. A novel electro optic ceramics Q-switched fiber laser[J]. Acta Optica Sinica (光学学报), 2008, 28(4): 726-729 (in Chinese).

[8] Lü X, Han Q, Liu T, et al. Actively Q-switched erbium-doped fiber ring laser with a nanosecond ceramic optical switch[J]. Laser Physics, 2014, 24(11): 115102.

[9] Upadhyaya B N, Chakravarty U, Kuruvilla A, et al. Mechanisms of generation of multi-peak and mode-locked resembling pulses in Q-switched Yb-doped fiber lasers[J]. Optics Express, 2007, 15(18): 11576-11588.

[10] Wang Y, Xu C Q. Actively Q-switched fiber lasers: Switching dynamics and nonlinear processes[J]. Progress in Quantum Electronics, 2007, 31(3): 131-216.

[11] Zhen L. The split pulses from actively Q-switched fiber lasers[J]. Laser Physics, 2013, 23(12): 125105.

[12] Zhang Wenqi. Study on Acousto-Optic Q-Switched Yb-Doped All-Fiber Laser in Master Oscillator Power Amplifier Configuration （MOPA结构声光调Q掺镱全光纤激光器研究)[D]. Beijing: Master Thesis of Beijing University of Technology, 2011 (in Chinese).

[13] Lan Xinju. Laser Technology (激光技术)[M]. Beijing: Science Press, 2009: 75-11（in Chinese).

周哲, 陈国梁, 许立新, 顾春, 赵威. 全光纤电光主动调Q激光器[J]. 量子电子学报, 2016, 33(5): 545. ZHOU Zhe, CHEN Guoliang, XU Lixin, GU Chun, ZHAO Wei. All fiber electro-optic actively Q-switched laser[J]. Chinese Journal of Quantum Electronics, 2016, 33(5): 545.

全光纤电光主动调Q激光器

关于本站 Cookie 的使用提示

全站搜索

全光纤电光主动调Q激光器

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索