Lingchao Kong, Jinyong Leng, Pu Zhou, Zongfu Jiang. Numerical modeling of the thermally induced core laser leakage in high power co-pumped ytterbium doped fiber amplifier[J]. High Power Laser Science and Engineering, 2018, 6(2): 02000e25
- High Power Laser Science and Engineering
- Vol. 6, Issue 2, 02000e25 (2018)
Fig. 1. Output power and PCE evolution of the co-pumped amplifier.
Fig. 2. Power distribution in the co-pumped amplifier in the first stage.
Fig. 3. Power distribution in the co-pumped amplifier in the second stage.
Fig. 4. Power distribution in the co-pumped amplifier in the third stage.
Fig. 5. Heat load and HOM loss distribution of the co-pumped fiber amplifier under 3000 W pump power.
Fig. 6. Distribution of the mode coupling coefficient of the co-pumped fiber amplifier under 3000 W pump power.
Fig. 7. Comparison of the output power evolution with the pump power for the co-pumping scheme and counter-pumping scheme.
Fig. 8. HOM loss and heat load distribution along the active fiber in the counter-pumping fiber amplifier under 3000 W pump power.
Fig. 9. RI profile at the output end of the YDF under 3000 W pump power for the co-pumping scheme and counter-pumping scheme.
Fig. 10. Output power and HOM ratio evolution with the pump power for 20 cm bending radius.
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Table 1. Parameters of the LMA 20/400 fiber.
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Table 2. Parameters of the 20/400 amplifier.
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