In our work, the stable Q-switched-mode-locked (QML) operations were generated in Er-doped fiber laser based on dispersion compensating fiber (DCF) saturable absorber (SA) for the first time. Firstly, the dissipative soliton mode-locked operation was achieved in fiber laser without DCF. After that, the DCFs with different lengths were separately added into fiber laser to gradually optimize the cavity, and QML operations could be observed. When the length of DCF was 5 m, the stable QML operations at the Q-switching envelope frequency of 72.84 kHz was obtained under the pump power of 637 mW. The maximum Q-switching envelope energy was 204 nJ which was 80 times higher than pulse energy of dissipative soliton, and the pulse width was 455.7 fs which was almost one seventh of that of dissipative soliton. To our knowledge, 455.7 fs is the shortest width of a single pulse at the peak position of the temporal envelope so far. These results indicate that DCF has excellent performance in obtaining QML operations.

在我们的工作中，基于色散补偿光纤（DCF）饱和吸收体（SA）的掺Er光纤激光器首次产生了稳定的Q开关锁模（QML）操作。首先，在没有DCF的光纤激光器中实现了耗散孤子锁模操作。之后，将不同长度的DCF分别添加到光纤激光器中，以逐步优化腔体，并观察到QML操作。当DCF的长度为5 m时，在637 mW的泵浦功率下，在72.84 kHz的Q开关包络频率下可获得稳定的QML操作。最大Q开关包络能量为204 nJ，比耗散孤子的脉冲能量高80倍，脉冲宽度为455.7 fs，几乎是耗散孤子的七分之一。据我们所知455。到目前为止，7 fs是单个脉冲在时间包络的峰值位置的最短宽度。这些结果表明DCF在获得QML操作方面具有出色的性能。