70-fs mode-locked erbium-doped fiber laser with topological insulator.
70-fs mode-locked erbium-doped fiber laser with topological insulator.
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DOI：
10.1038/srep19997
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发表时间：
2016-01-27
影响因子：
4.6
通讯作者：
Wei Z
中科院分区：
文献类型：
--
作者：
Liu W;Pang L;Han H;Tian W;Chen H;Lei M;Yan P;Wei Z
飞秒光脉冲在光通信、天文频率梳和激光光谱学中有应用。在这里，提出了一种混合锁模掺铒光纤（EDF）激光器与拓扑绝缘体（TI），为第一次，我们最好的知识。采用脉冲激光沉积（PLD）方法制备了光纤锥形TI可饱和吸收体（TISA）。利用光纤锥形TISA实现了掺铒光纤激光器的非线性偏振演化（NPE）被动锁模，获得了70fs的1542nm脉冲，3dB谱宽63nm，重复频率95.4MHz，转换效率14.12%。实验结果表明，这种混合锁模EDF激光器具有更好的性能，可以在未来实现更短的脉冲、更高的功率和更低的锁模阈值。
Femtosecond optical pulses have applications in optical communication, astronomical frequency combs, and laser spectroscopy. Here, a hybrid mode-locked erbium-doped fiber (EDF) laser with topological insulator (TI) is proposed, for the first time to our best knowledge. The pulsed laser deposition (PLD) method is employed to fabricate the fiber-taper TI saturable absorber (TISA). By virtue of the fiber-taper TISA, the hybrid EDF laser is passively mode-locked using the nonlinear polarization evolution (NPE), and emits 70 fs pulses at 1542 nm, whose 3 dB spectral width is 63 nm with a repetition rate and transfer efficiency of 95.4 MHz and 14.12%, respectively. Our experiments indicate that the proposed hybrid mode-locked EDF lasers have better performance to achieve shorter pulses with higher power and lower mode-locking threshold in the future.