Kunpeng Luan, Yanlong Shen, Mengmeng Tao, Hongwei Chen, Chao Huang, Aiping Yi, Ke Huang. Numerical Simulation of 3.5 μm Dual-Wavelength Pumped Er∶ZBLAN Fiber Lasers[J]. Chinese Journal of Lasers, 2019, 46(10): 1001008
- Chinese Journal of Lasers
- Vol. 46, Issue 10, 1001008 (2019)
Fig. 1. Schematic of the energy levels relevant to the 3.5 μm Er3+∶ZBLAN fiber laser
Fig. 2. Comparison between experimental results and simulations. (a) H2016 experimental results and simulations in this paper; (b) M2017 experimental results and simulations in this paper
Fig. 3. Simulation results of a typical 3.5 μm laser oscillating generation process
Fig. 4. Particle density, signal and pump power at different fiber positions. (a) Particle density of each energy level when continuous oscillation is steady; (b) signal and pump power at each fiber element
Fig. 5. Influence of overlap factor on the 3.5 μm laser power. (a) Γp1; (b) Γp2
Fig. 6. 3.5 μm laser power as a function of 975 nm pump power. (a) With ESA2; (b) without ESA2; (c) comparison between with and without ESA2 when P2=6 W
Fig. 7. 3.5 μm laser power as a function of 1975 nm pump power
Fig. 8. Impact of output coupler reflectivity on 3.5 μm laser power
Fig. 9. 3.5 μm laser output power and efficiencies with different fiber lengths and output coupler reflectivities. (a) Roc=20%; (b) Roc=30%; (c) Roc=40%; (d) slope efficiencies and pump thresholds
Fig. 10. Impacts of interionic interaction on 3.5 μm laser power. (a) W1103; (b) W2206; (c) W4251; (d) W5031
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Table 1. Spectroscopic constant parameters of Er3+[16-17]
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Table 2. Variable spectroscopic parameters and fiber parameters[4,16-17]
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