Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback
A modified rate equation model was presented to theoretically investigate the nonlinear dynamics of solitary two-state quantum dot lasers (TSQDLs) under optical feedback. The simulated results showed that, for a TSQDL biased at a relatively high current, the ground-state (GS) and excited-state (ES)...
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MDPI AG
2021-07-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/8/300 |
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| author | Xiang-Hui Wang Zheng-Mao Wu Zai-Fu Jiang Guang-Qiong Xia |
| author_facet | Xiang-Hui Wang Zheng-Mao Wu Zai-Fu Jiang Guang-Qiong Xia |
| author_sort | Xiang-Hui Wang |
| collection | DOAJ |
| description | A modified rate equation model was presented to theoretically investigate the nonlinear dynamics of solitary two-state quantum dot lasers (TSQDLs) under optical feedback. The simulated results showed that, for a TSQDL biased at a relatively high current, the ground-state (GS) and excited-state (ES) lasing of the TSQDL can be stimulated simultaneously. After introducing optical feedback, both GS lasing and ES lasing can exhibit rich nonlinear dynamic states including steady state (S), period one (P1), period two (P2), multi-period (MP), and chaotic (C) state under different feedback strength and phase offset, respectively, and the dynamic states for the two lasing types are always identical. Furthermore, the influences of the linewidth enhancement factor (LEF) on the nonlinear dynamical state distribution of TSQDLs in the parameter space of feedback strength and phase offset were also analyzed. For a TSQDL with a larger LEF, much more dynamical states can be observed, and the parameter regions for two lasing types operating at chaotic state are widened after introducing optical feedback. |
| first_indexed | 2024-03-10T08:28:19Z |
| format | Article |
| id | doaj.art-6db1f38f696e4aebb10c3b6e10bcab63 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T08:28:19Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
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| series | Photonics |
| spelling | doaj.art-6db1f38f696e4aebb10c3b6e10bcab632023-11-22T09:16:15ZengMDPI AGPhotonics2304-67322021-07-018830010.3390/photonics8080300Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical FeedbackXiang-Hui Wang0Zheng-Mao Wu1Zai-Fu Jiang2Guang-Qiong Xia3Chongqing City Key Laboratory of Micro & Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaChongqing City Key Laboratory of Micro & Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaChongqing City Key Laboratory of Micro & Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaChongqing City Key Laboratory of Micro & Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaA modified rate equation model was presented to theoretically investigate the nonlinear dynamics of solitary two-state quantum dot lasers (TSQDLs) under optical feedback. The simulated results showed that, for a TSQDL biased at a relatively high current, the ground-state (GS) and excited-state (ES) lasing of the TSQDL can be stimulated simultaneously. After introducing optical feedback, both GS lasing and ES lasing can exhibit rich nonlinear dynamic states including steady state (S), period one (P1), period two (P2), multi-period (MP), and chaotic (C) state under different feedback strength and phase offset, respectively, and the dynamic states for the two lasing types are always identical. Furthermore, the influences of the linewidth enhancement factor (LEF) on the nonlinear dynamical state distribution of TSQDLs in the parameter space of feedback strength and phase offset were also analyzed. For a TSQDL with a larger LEF, much more dynamical states can be observed, and the parameter regions for two lasing types operating at chaotic state are widened after introducing optical feedback.https://www.mdpi.com/2304-6732/8/8/300nonlinear dynamicsquantum dot lasersoptical feedbackchaoticlinewidth enhancement factor (LEF) |
| spellingShingle | Xiang-Hui Wang Zheng-Mao Wu Zai-Fu Jiang Guang-Qiong Xia Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback Photonics nonlinear dynamics quantum dot lasers optical feedback chaotic linewidth enhancement factor (LEF) |
| title | Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback |
| title_full | Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback |
| title_fullStr | Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback |
| title_full_unstemmed | Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback |
| title_short | Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback |
| title_sort | nonlinear dynamics of two state quantum dot lasers under optical feedback |
| topic | nonlinear dynamics quantum dot lasers optical feedback chaotic linewidth enhancement factor (LEF) |
| url | https://www.mdpi.com/2304-6732/8/8/300 |
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