Tsai Tzong-Yow, Tsao Hong-Xi, Huang Chun-Lin, Chen Wei-Ju
Opt Express. 2015 May 4;23(9):11205-10. doi: 10.1364/OE.23.011205.
We propose and demonstrate a passively Q-switched 1900-nm thulium all-fiber laser using the mode-field-area mismatch method. A thulium fiber laser was core-pumped at 1590 nm and saturable-absorber Q-switched at 1900 nm through the use of a thulium saturable absorber fiber that had a relatively smaller mode field area than the gain medium. Sequential pulsing with a pulse energy of 12 μJ and a pulse duration of 160 ns was obtained. The pulse repetition rate was increased linearly with the applied pump power. With a pump power of 4.5 W, an average output power of 0.61 W and a pulse repetition rate of 50.7 kHz were achieved.
我们提出并演示了一种采用模场面积失配方法的被动调Q 1900纳米掺铥全光纤激光器。一台掺铥光纤激光器在1590纳米处进行纤芯泵浦，并通过使用模场面积比增益介质相对更小的掺铥饱和吸收光纤在1900纳米处实现饱和吸收体调Q。获得了脉冲能量为12微焦、脉冲持续时间为160纳秒的序列脉冲。脉冲重复频率随施加的泵浦功率线性增加。在泵浦功率为4.5瓦时，实现了平均输出功率0.61瓦和脉冲重复频率50.7千赫。
