| 100 W级全光纤化线偏振单频光纤放大器 |
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| 引用本文： | 张昆,房一涛,余洋,李尧,宋奎岩,张利明,张大勇,赵鸿.100 W级全光纤化线偏振单频光纤放大器[J].强激光与粒子束,2022,34(3):031001-1-031001-4. |
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| 作者姓名： | 张昆 房一涛 余洋 李尧 宋奎岩 张利明 张大勇 赵鸿 |
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| 作者单位： | 中国电子科技集团公司 第十一研究所 固体激光技术重点实验室，北京 100015 |
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| 基金项目： | 国防科技重点实验室基金项目（6142404200101）； |
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| 摘 要： | 报道了一种基于主振荡功率放大结构的全光纤化1064 mm线偏振单频光纤放大器。种子源是一个线宽约为3 kHz的单频光纤激光器。输出功率为50 mW的种子激光经两级掺Yb保偏双包层光纤(光纤纤芯直径分别为10 μm和20 μm)和一级手性耦合纤芯增益光纤放大后，最终获得了输出功率138 W、光束质量M2≤1.2、偏振消光比优于18 dB的高功率单频光纤激光输出。在脉冲调制模式下，获得了峰值功率465 W、脉宽宽度约为500 μs的线偏振单频光纤激光输出。
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| 关 键 词： | 单频 光纤激光器 手性耦合纤芯光纤 全光纤化 |
| 收稿时间： | 2021-07-13 |
100 W-level single-frequency fiber amplifier with all-fiber linear polarization |
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| Affiliation: | Key Laboratory of Solid State Laser, the 11th Research Institute of China Electronics Technology Group, Beijing 100015, China |
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| Abstract: | An all-fiber 1064 mm linearly polarized single-frequency fiber laser based on the master oscillator-power amplifier structure is reported. The seed was a single-frequency fiber laser with a line width of about 3 kHz. The seed laser with an output power of 50 mW was amplified by two-stage Yb-doped polarization-maintaining double-cladding (the core diameters are 10 μm and 20 μm respectively) fiber and a stage chirally coupled core gain fiber, and the high power single frequency fiber laser output with an output power of 138 W, the beam quality M2≤1.1 and the polarization extinction ratio better than 18 dB was finally obtained. At the pulse modulation mode, a linearly-polarized single-frequency fiber laser output with a peak power of 465 W and a pulse duration of about 500 μs was obtained. |
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