Opt Lett. 2018 Jul 15;43(14):3361-3364. doi: 10.1364/OL.43.003361.
We report a 30 cm long Nd/Yb co-doped silica glass fiber amplifier with well-maintained broadband gain through simultaneous dual-laser pumping at 808 and 975 nm. By controlling the ratio of the pump power at 975 (P) and 808 nm (P), the emission band of Yb/Nd and the energy transfer efficiency of Nd→Yb can be well controlled; thus, a tunable broadband and flat gain in the range of 1036-1080 nm are obtained. The theoretical calculation of the energy transfer efficiency of Nd→Yb with dual-laser pumping of 808 and 975 nm explains well the mechanism of broadband and flat gain formation in the Nd/Yb co-doped fiber.
我们报告了一种 30cm 长的掺 Nd/Yb 硅玻璃光纤放大器，通过在 808nm 和 975nm 同时进行双激光泵浦，实现了宽带增益的良好维持。通过控制 975nm（P）和 808nm（P）泵浦功率的比值，可以很好地控制 Yb/Nd 的发射带和 Nd→Yb 的能量传递效率，从而在 1036-1080nm 范围内获得可调谐的宽带和平坦增益。808nm 和 975nm 双激光泵浦下 Nd→Yb 的能量传递效率的理论计算很好地解释了 Nd/Yb 共掺光纤宽带平坦增益形成的机理。
