Opt Lett. 2018 Jul 15;43(14):3301-3304. doi: 10.1364/OL.43.003301.
A simple and efficient femtosecond nonlinear polarization evolution (NPE) mode-locked laser is presented. Different from conventional NPE fiber lasers, the polarization beam splitter (PBS) is three-dimensionally manipulated to achieve polarization control and state selection in our NPE laser. The polarizer, half-wave plate, and quarter-wave plate from conventional NPE fiber lasers are replaced by this PBS. Thus, the configuration and the system gain of our proposed laser are simply and efficiently improved. As a result, transfer efficiency of 24.17% is experimentally demonstrated. In addition, measured self-started pulses with average power of 49 mW and center wavelength of 1584 nm are generated with single-pulse energy of 1.51 nJ.
本文提出了一种简单高效的飞秒非线性偏振演化（NPE）锁模激光器。与传统的 NPE 光纤激光器不同，我们的 NPE 激光器通过三维操控偏振分束器（PBS）来实现偏振控制和状态选择。传统的 NPE 光纤激光器中的偏振器、半波片和四分之一波片被 PBS 取代。因此，我们提出的激光的配置和系统增益得到了简单而有效地改善。实验结果表明，转换效率达到了 24.17%。此外，还实现了平均功率为 49mW、中心波长为 1584nm、单脉冲能量为 1.51nJ 的自启动脉冲。
