50 W low noise dual-frequency laser fiber power amplifier
50 W low noise dual-frequency laser fiber power amplifier
复制标题
50W低噪声双频激光光纤功率放大器
DOI：
10.1364/oe.24.009202
复制
发表时间：
2016-05-02
期刊：
影响因子：
3.8
通讯作者：
He, Tao
中科院分区：
文献类型：
--
作者：
Kang, Ying;Cheng, Lijun;He, Tao
提出了一种三级双频激光信号放大系统。窄线宽 Nd:YAG 非平面环形振荡器 (NPRO) 的输出被分为两部分，其中一部分由声光调制器 (AOM) 进行频移，然后耦合到单模光纤中。另一部分耦合到另一根单模光纤中，然后通过 2:1 单模光纤耦合器与频移光束组合。组合光束的功率为 20 mW，包含频率间隔为 150 +/- 25 MHz 的两个频率分量。双频信号通过三级掺镱二极管泵浦光纤功率放大器进行放大。最大放大功率为50.3 W，对应最后一级的斜率效率为73.72%。差拍信号的调制深度和信噪比（SNR）在放大过程中得到很好的保持。双频激光光纤功率放大器提供强大的高功率和低噪声的光承载射频信号。 (C) 2016年美国光学学会
A three-stage dual-frequency laser signal amplification system is presented. An output from a narrow-linewidth Nd:YAG nonplanar ring-oscillator (NPRO) is split into two parts, one of them is frequency shifted by an acoustooptic modulator (AOM) then coupled into a single mode optical fiber. The other part is coupled into another single mode fiber then combined with the frequency-shifted beam with a 2 to 1 single mode fiber coupler. The combined beam has a power of 20 mW containing two frequency components with frequency separation of 150 +/- 25 MHz. The dual-frequency signal is amplified via a three-stage Yb3+-doped diode pumped fiber power amplifier. The maximum amplified power is 50.3 W corresponding to a slope efficiency of 73.72% of the last stage. The modulation depth and signal to noise ratio (SNR) of the beat signal are well maintained in the amplifying process. The dual-frequency laser fiber power amplifier provides robust optical carried RF signal with high power and low noise. (C) 2016 Optical Society of America