Quan Sheng, Hanying Si, Jianmin An, Haiwei Zhang, Junxiang Zhang, Yu Ding, Shengcai Li, Wei Shi, Jianquan Yao. Numerical analysis on backward light amplification and damage in high-power fiber laser[J]. Infrared and Laser Engineering, 2020, 49(10): 20200009
- Infrared and Laser Engineering
- Vol. 49, Issue 10, 20200009 (2020)
Fig. 1. Theoretical model of the ytterbium-doped fiber amplifer (YDFA)
Fig. 2. Forward signal, pump power and normalized population inversion of fiber amplifier as functions of fiber position z （P p(0)=11.8 kW、P s+(0)=1 kW）
Fig. 3. Amplification of different incident backward powers in the active fiber （P p(0)=11.8 kW、P s+(0)=1 kW）
Fig. 4. Signal output power and amplified backward power as functions of incident backward power （P p(0)=11.8 kW, P s+(0)=1 kW）
Fig. 5. Thermal load per unit length in the gain fiber and the total thermal load（P p(0)=11.8 kW, P s−(10)=1 kW）
Fig. 6. Temperature distribution with different backward powers in the active fiber（P p(0)=11.8 kW, P s−(10)=1 kW）
Fig. 7. Amplification of backward signal in the active fiber with different forward signal powers（P p(0)=11.8 kW, P s−(10)=10 W）
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Table 1. [in Chinese]
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Table 2. [in Chinese]
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