中国激光, 2017, 44 (2): 0201020, 网络出版: 2017-02-22   

掺钕双包层大模场保偏光子晶体光纤激光器

Nd-Doped Double-Clad Large-Mode-Area Polarization-Maintaining Photonic Crystal Fiber Laser
作者单位
济南大学物理科学与技术学院, 山东 济南 250022
摘要
采用掺钕双包层大模场保偏光子晶体光纤(PCF)作为增益介质,实现了1.06 μm连续激光运转。实验采用线型谐振腔,光纤一端研磨成0°角作为自由耦合输出端,并提供4%的反馈光用于维持谐振腔内的激光振荡。激光器阈值为2.4 W,斜效率为18.8%。当抽运功率达到30 W时,最大输出功率为4.94 W,光束质量因子为1.30,偏振串音为-7.9 dB,输出激光的中心波长为1062.7 nm。实验结果表明,掺钕双包层大模场PCF具有良好的单模传输特性和保偏性能,有利于激光器实现高功率高光束质量的激光输出。
Abstract
A continuous wave laser based on Nd-doped double-clad large-mode-area polarization-maintaining photonic crystal fiber (PCF) is realized at 1.06 μm. A linear-cavity is employed, and one end face of the fiber is polished to 0° providing 4% feedback serve as a cavity mirror and a free output coupler. The slope efficiency obtained is 18.8% with a threshold pump power of 2.4 W. The maximum output power is 4.94 W and the beam quality factor is 1.30, when the pump power is 30 W. The measured central wavelength is 1062.7 nm and the polarized crosstalk factor is -7.9 dB. Experimental results show that the Nd-doped double-clad large-mode-area PCF has well single mode propagation and polarization-maintaining characteristics, and is beneficial to achieve high power laser output with high beam quality.
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张峰, 张海鹍, 陈涛, 宋朋, 周城. 掺钕双包层大模场保偏光子晶体光纤激光器[J]. 中国激光, 2017, 44(2): 0201020. Zhang Feng, Zhang Haikun, Chen Tao, Song Peng, Zhou Cheng. Nd-Doped Double-Clad Large-Mode-Area Polarization-Maintaining Photonic Crystal Fiber Laser[J]. Chinese Journal of Lasers, 2017, 44(2): 0201020.

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