High Power Laser Science and Engineering, 2018, 6 (3): 03000e51, Published Online: Sep. 26, 2018
Toward high-power nonlinear fiber amplifier Download: 610次
Figures & Tables
Fig. 2. The power distribution of pump, signal, and Raman waves in forward and backward propagating directions. It can be found that Raman Stokes wave (1120 nm) has arisen in both directions, and the power is 642 W and 387 W for forward and backward directions, respectively.
Fig. 3. (a) The power distribution of the pump, signal, and first-order Stokes waves; (b) the forward and (c) backward output spectra of the NFA. The seed is consisted of 200 W 1070 nm laser and 10 W 1120 nm laser, respectively.
Fig. 4. The dependence of backward output power on the power of 1120 nm seed laser. Insets are the output spectra in backward direction at different power.
Fig. 5. The center temperature of the core for NFA and conventional amplifier in (a) forward pumping scheme and (b) bi-direction pumping scheme. In the calculation, all the parameters of the bi-direction pumping scheme are the same as of the forward pumping scheme, excepting the pump power is divided equally into two directions.
Fig. 10. The output property of the tandem-pumped NFA: (a) output power; (b) spectrum at full power.
Fig. 11. The measured 1090 nm laser power in the case of only 1090 nm seed with power of 56 W.
Hanwei Zhang, Pu Zhou, Hu Xiao, Jinyong Leng, Rumao Tao, Xiaolin Wang, Jiangming Xu, Xiaojun Xu, Zejin Liu. Toward high-power nonlinear fiber amplifier[J]. High Power Laser Science and Engineering, 2018, 6(3): 03000e51.