Yi-Sha Chen, Lei Liao, Jin-Yan Li. Experimental study on influence of fiber numerical aperture on mode instability threshold of ytterbium fiber oscillator [J]. Acta Physica Sinica, 2019, 68(11): 114206-1
- Acta Physica Sinica
- Vol. 68, Issue 11, 114206-1 (2019)
Fig. 1. Experimental setup of fiber oscillator pumped by 976 nm LDs.光纤振荡器结构图(抽运源为976 nm波长的激光器)
Fig. 2. Output power and pump power curve of fiber 1: (a) Correlation between output power/optical-optical efficiency and pump power; (b) output power/normalized standard deviation and pump power.光纤1的输出功率-抽运功率曲线 (a) 输出功率/光光效率-抽运抽运功率关系; (b) 输出功率/归一化标准差-抽运功率关系
Fig. 3. Output time domain of different power of fiber 1: (a) 1400 W pump power; (b) 1500 W pump power.光纤1的输出功率时域信号 (a) 1400 W抽运源; (b) 1500 W抽运源
Fig. 4. Output frequency domain of different power of fiber 1: (a) 1400 W pump power; (b) 1500 W pump power.光纤1的输出功率频域信号 (a) 1400 W抽运源; (b) 1500 W抽运源
Fig. 5. Output power and pump power curve of fiber 2: (a) Correlation between output power/optical-optical efficiency and pump power; (b) output power/normalized standard deviation and pump power.光纤2的输出功率-抽运功率曲线 (a) 输出功率/光光效率-抽运功率关系; (b) 输出功率/归一化标准差-抽运功率关系
Fig. 6. Output time domain of different power of fiber 2: (a) 1500 W pump power; (b) 1600 W pump power.光纤2的输出功率时域信号 (a) 1500 W抽运源; (b) 1600 W抽运源
Fig. 7. Output frequency domain of different power of fiber 2: (a) 1500 W pump power; (b) 1600 W pump power.光纤2的输出功率频域信号 (a) 1500 W抽运源; (b) 1600 W抽运源
Fig. 8. LP01 and LP11 mode profile in fiber at different NA : (a) LP01; (b) LP11.
具有不同NA 光纤中的LP01和LP11模式分布 (a) LP01; (b) LP11
Fig. 9. Bending loss of LP11 versus bending radius at different fiber core NA .
具有不同NA 光纤的LP11弯曲损耗随弯曲直径变化曲线
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Table 1. Yb-doped fiber parameter applied in the experiment.
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