Liu Fei, Li Jianfeng, Luo Hongyu, Wu Qi, Wu Xiaodong, Ouellette Francois, Liu Yong
Opt Express. 2021 Mar 1;29(5):6553-6562. doi: 10.1364/OE.412345.
We experimentally present mid-infrared Raman soliton self-frequency shift (SSFS) process in a Tm-doped fiber amplifier using sideband-suppressed conventional solitons as seed pulses. The strong Kelly sidebands of the soliton oscillator were efficiently suppressed (more than 21 dB) using a home-made all-fiber Lyot filter (AFLF). As a result, the Raman solitons with a continuously tunable wavelength of 1.95-2.34 µm were achieved, with a high soliton energy conversion of >93% over the range of 1.95-2.24 µm. The conversion efficiency and tunable range of Raman solitons were both significantly improved, comparing to the same amplifier seeded with sideband-unsuppressed pulses.
我们通过实验展示了在掺铥光纤放大器中，利用边带抑制的传统孤子作为种子脉冲的中红外拉曼孤子自频移（SSFS）过程。使用自制的全光纤利奥特滤波器（AFLF）有效地抑制了孤子振荡器的强凯利边带（超过21 dB）。结果，实现了波长在1.95 - 2.34 µm范围内连续可调的拉曼孤子，在1.95 - 2.24 µm范围内具有大于93%的高孤子能量转换率。与使用未抑制边带脉冲作为种子的同一放大器相比，拉曼孤子的转换效率和可调范围都得到了显著提高。
