Experimental study on 1137 nm long wavelength Yb-doped fiber lasers
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摘要: 分别使用976 nm半导体激光器和1040 nm光纤激光器作为泵浦源，实现了1137 nm长波光纤激光器的出光，输出功率均超过百mW。激光器采用相同的线性腔结构，高反光栅和低反光栅的反射率分别为99.6%和39.7%，增益介质是一段8 m长的掺镱光纤，纤芯直径5 m。当976 nm半导体泵浦功率为912 mW时，1137 nm激光输出功率为182 mW，对应的斜率效率为28.5%；当1040 nm激光功率为1.59 W时，输出的1137 nm激光功率为278 mW，斜率效率约为25%。在此基础上对两种泵浦方式进行了对比分析。Abstract: We reported the experiments of 1137 nm Yb-doped fiber laser, which was pumped by 976 nm laser diode and 1040 nm fiber laser respectively. Both of the output powers of the experiments were over hundred-milliwatt. The laser was a linear cavity. The reflectivities of the high reflectivity fiber Bragg grating and low reflectivity output coupler were 99.6% and 39.7% respectively. The gain media was an 8-meters-long Yb-doped fiber with a core diameter of 5 m. When the power of the 976 nm laser diode was 912 mW, the output power of 1137 nm laser reached to 182 mW corresponding to the slope efficiency of 28.5%. When pumped by 1.59 W 1040 nm fiber laser, a 278 mW 1137 nm laser power was obtained with a slope efficiency of 25%. We also compared the differences of these two pumping methods.
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Key words:
- Yb-doped fiber /
- long wavelength /
- amplified spontaneous emission
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