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Numerical investigation on photonic microwave generation by a sole excited-state emitting quantum dot laser with optical injection and optical feedback |
| Zai-Fu Jiang(蒋再富)1,2, Zheng-Mao Wu(吴正茂)1,†, Wen-Yan Yang(杨文艳)3, Chun-Xia Hu(胡春霞)1,4, Yan-Hong Jin(靳艳红)1,4, Zhen-Zhen Xiao(肖珍珍)1, and Guang-Qiong Xia(夏光琼)1,‡ |
1 School of Physical Science and Technology, Southwest University, Chongqing 400715, China;
2 School of Mathematics and Physics, Jingchu University of Technology, Jingmen 448000, China;
3 School of Physics, Chongqing University of Science and Technology, Chongqing 401331, China;
4 College of Mobile Telecommunications, Chongqing University of Posts and Telecom, Chongqing 401520, China |
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Abstract Based on three-level exciton model, the enhanced photonic microwave signal generation by using a sole excited-state (ES) emitting quantum dot (QD) laser under both optical injection and optical feedback is numerically studied. Within the range of period-one (P1) dynamics caused by the optical injection, the variations of microwave frequency and microwave intensity with the parameters of frequency detuning and injection strength are demonstrated. It is found that the microwave frequency can be continuously tuned by adjusting the injection parameters, and the microwave intensity can be enhanced by changing the injection strength. Moreover, considering that the generated microwave has a wide linewidth, an optical feedback loop is further employed to compress the linewidth, and the effect of feedback parameters on the linewidth is investigated. It is found that with the increase of feedback strength or delay time, the linewidth is evidently decreased due to the locking effect. However, for the relatively large feedback strength or delay time, the linewidth compression effect becomes worse due to the gradually destroyed P1 dynamics. Besides, through optimizing the feedback parameters, the linewidth can be reduced by up to more than one order of magnitude for different microwave frequencies.
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Received: 13 October 2020
Revised: 03 December 2020
Accepted manuscript online: 11 December 2020
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PACS:
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05.45.Pq
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(Numerical simulations of chaotic systems)
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42.55.Px
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(Semiconductor lasers; laser diodes)
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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68.65.Hb
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(Quantum dots (patterned in quantum wells))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61775184 and 61875167). |
Corresponding Authors:
Zheng-Mao Wu, Guang-Qiong Xia
E-mail: zmwu@swu.edu.cn;gqxia@swu.edu.cn
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Cite this article:
Zai-Fu Jiang(蒋再富), Zheng-Mao Wu(吴正茂), Wen-Yan Yang(杨文艳), Chun-Xia Hu(胡春霞), Yan-Hong Jin(靳艳红), Zhen-Zhen Xiao(肖珍珍), and Guang-Qiong Xia(夏光琼) Numerical investigation on photonic microwave generation by a sole excited-state emitting quantum dot laser with optical injection and optical feedback 2021 Chin. Phys. B 30 050504
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