Ultrashort pulse generation in a semiconductor laser with strong coherent optical feedback
Ultrashort pulse generation in a semiconductor laser with strong coherent optical feedback
复制标题
DOI：
10.1049/iet-opt.2018.5010
复制
发表时间：
2019-02
影响因子：
1.6
通讯作者：
Iet Optoelectronics;Yuanlong Fan;K. A. Shore;Yanhua Hong
中科院分区：
文献类型：
--
作者：
Iet Optoelectronics;Yuanlong Fan;K. A. Shore;Yanhua Hong
在这项研究中，作者提出了一种利用半导体激光器产生超短脉冲的新技术，该激光器受到来自短腔的强光反馈。研究了三个系统参数的影响，即三个系统参数。数值研究了外腔长度、注入电流和反馈强度对超短脉冲特性的影响。结果表明，随着这三个参数的增加，脉冲宽度减小，脉冲峰值增大。超短脉冲的重复频率随反馈强度的增大而减小，随注入电流的增大而增大。在此基础上，当注入电流为阈值电流的4倍时，获得了脉冲宽度为3.6ps、重复频率为2.3 GHz的超短脉冲。通过适当调整外腔长度和反馈强度，可以进一步减小脉冲宽度，提高重复频率。研究结果为超短脉冲发生器的设计提供了一条新的途径，可应用于未来的光子集成光学电路。
In this study, the authors propose a novel technique for generating ultrashort pulses using a semiconductor laser subject to strong optical feedback from short external cavities. The influence of three system parameters, viz. the external cavity length, the injection current and the feedback strength on the characteristics of the ultrashort pulses is numerically investigated. The results show that the pulse width decreases and the pulse peak increases with increase of any of these three parameters. The repetition frequency of the ultrashort pulses decreases with increase of the feedback strength but increases with increase of the injection current. Based on these results, ultrashort pulses with a pulse width of 3.6 ps and a repetition frequency of 2.3 GHz have been achieved when the injection current is four times the threshold current. The pulse width can be further decreased and the repetition frequency can be further increased by appropriately adjusting the external cavity length and feedback strength. The results presented in this study open up a new route for designing ultrashort pulse generators for incorporation in future photonic integrated optical circuits.