Opt Lett. 2013 Dec 15;38(24):5212-5. doi: 10.1364/OL.38.005212.
We report on the generation of passive harmonic mode locking of a fiber laser using a microfiber-based topological insulator (TI) Bi(2)Te(3) saturable absorber (SA). The optical deposition method was employed to fabricate the microfiber-based TISA. By virtue of the excellent nonlinear optical property of the proposed TISA, the fiber laser could operate at the pulse repetition rate of 2.04 GHz under a pump power of 126 mW, corresponding to the 418th harmonic of fundamental repetition frequency. The results demonstrate that the microfiber-based TI photonic device can operate as both the high nonlinear optical component and the SA in fiber lasers, and could also find other applications in the related fields of photonics.
我们报告了使用基于微光纤的拓扑绝缘体 (TI) Bi(2)Te(3)可饱和吸收体 (SA) 产生光纤激光器被动谐波锁模的情况。采用光学沉积法制备了基于微光纤的 TI-SA。由于所提出的 TI-SA 的优异非线性光学特性，光纤激光器在 126mW 的泵浦功率下可以以 2.04GHz 的脉冲重复率工作，对应于基频重复频率的第 418 次谐波。结果表明，基于微光纤的 TI 光子器件可以同时作为光纤激光器中的高非线性光学元件和 SA 使用，并且在光子学的相关领域也可能有其他应用。
