Nonlinear Dynamics of Exclusive Excited-State Emission Quantum Dot Lasers Under Optical Injection

Jiang, Zaifu; Wu, Zhijian; Jayaprasath, Elumalai; Yang, Wei; Hu, Chunxia; Xia, Guang-Qiong

doi:10.3390/photonics6020058

Cited by 15 publications

(8 citation statements)

References 46 publications

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“…Furthermore, some theoretical and experimental simulations show that the nonlinear dynamics behavior of SLs can be influenced by an external perturbation such as optical feedback [38][39][40], optoelectronic feedback [41][42][43][44], mutual coupling [45][46][47], and optical injection [12,[48][49][50]. Then the regions of more complex dynamics can be expanded with these external perturbations.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Nonlinear Dynamics Based on Spin-VCSELs with Optical Feedback

Song

Xie

et al. 2021

Photonics

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In this paper, the nonlinear dynamics of a novel model based on optically pumped spin-polarized vertical-cavity surface-emitting lasers (spin-VCSELs) with optical feedback is investigated numerically. Due to optical feedback being the external disturbance component, the complex nonlinear dynamical behaviors can be enhanced and the regions of different nonlinear dynamics in size can be extended with appropriate parameters of spin-VCSELs. According to the equations of the modified spin-flip model (SFM), the comparison of bifurcation diagrams is first presented for the clear presentation of different routes to chaos. Meanwhile, numerous bifurcation diagrams in color are illustrated to demonstrate the rich dynamical regimes intuitively, and the crucial effects of optical feedback strength, feedback delay, linewidth enhancement factor, and spin-flip relaxation rate on the region evolvement of complex dynamics of the proposed model are revealed to investigate the dependence of dynamical behaviors on external and internal parameters when the optical feedback scheme is introduced. These parameters play a remarkable role in enhancing the mechanism of complex dynamic oscillations. Furthermore, utilizing combination with time series, power spectra, and phase portraits, the various dynamical behaviors observed in the bifurcation diagram are simulated numerically. Correspondingly, the powerful measure 0–1 test is employed to distinguish between chaos and non-chaos.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Nonlinear Dynamics Based on Spin-VCSELs with Optical Feedback

Song

Xie

et al. 2021

Photonics

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“…Our earlier work revealed that the ES-QD laser can exhibit rich nonlinear dynamic behaviors under external optical injection, in which a large area of P1 oscillation appears in the positive frequency detuning region. [36] Based on this work, we have studied the distributions of the P1 microwave frequency and microwave intensity within this region, and employed optical feedback technology to stabilize the microwave signal and narrow the microwave linewidth.…”

Section: Introductionmentioning

confidence: 99%

“…[35] Besides, two excitonic energy levels of the GS and the ES are considered in the QD ensemble, and the stimulated emission only occurs in ES in this system. [19,36] To this end, the carriers are first injected into the reservoir (RS) before being captured to the ES within the time τ RS ES , and then they will relax into the GS within the time τ ES GS . [37] On the other hand, several carriers will escape from GS (ES) within the time τ GS ES (τ ES RS ) due to the thermal excitations.…”

Section: Introductionmentioning

confidence: 99%

“…Combining with Refs. [35,36], the photonic microwave signal generation by using an optically injected ES-QD laser with optical feedback is described by the following rate equations:…”

Section: Introductionmentioning

confidence: 99%

“…Where, the electrons and holes are treated as excitons (electron-hole pairs), and it is assumed that the active region has only one ensemble [35]. Besides, two excitonic energy levels of the GS and the ES are considered in the QD ensemble, and the stimulated emission only occurs in ES in this system [19,36]. To this end, the carriers are first…”

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confidence: 99%

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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*

Jiang

Yang

et al. 2021

Chinese Phys. B

Self Cite

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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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Modelling and experimental characterization of double layer InP/AlGaInP quantum dot laser

Abbas,

Sabry,

Omran

et al. 2023

Opt Quant Electron

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Spectrum of an InP/AlGaInP self- assembled double-layer quantum dot (QD) laser fabricated by metal–organic vapor-phase epitaxy is theoretically and experimentally investigated. A bimodal QD size distribution (small and large QD groups) was detected which is formed during the fabrication. A model is proposed based on rate equations accounting for the superposition of two inhomogeneous QD groups. The total output power and the power spectral density (PSD) of the fabricated QD laser are experimentally characterized at room temperature. The output spectrum is segmented into the sum of two Gaussians curves (super Gaussian) belonging to the small and large QD groups. The peak PSD and the spectral width of each group are extracted and their dependency on the injected current density is analysed. The peak of the large QDs is found to be dominant at small current while the peak of the small QDs dominated at high current alongside a reduction in its spectral width leading to lasing based on them. This behaviour is attributed to the saturation of the large QDs energy levels due to its relatively long radiative lifetime. The experimental analysis is in a good agreement with the theoretical results.

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Nonlinear Dynamics of Exclusive Excited-State Emission Quantum Dot Lasers Under Optical Injection

Cited by 15 publications

References 46 publications

Numerical Analysis of Nonlinear Dynamics Based on Spin-VCSELs with Optical Feedback

Numerical Analysis of Nonlinear Dynamics Based on Spin-VCSELs with Optical Feedback

Numerical investigation on photonic microwave generation by a sole excited-state emitting quantum dot laser with optical injection and optical feedback*

Modelling and experimental characterization of double layer InP/AlGaInP quantum dot laser

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