Polarization-resolved cartography of light emission of a vertical-cavity surface-emitting laser with high space and frequency resolution

Wang, T.; Lippi, G. L.

doi:10.1063/1.4935040

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…Among different optical TDRC schemes, the system of semiconductor laser (SL) with time-delayed feedback has been used for generating broadband chaotic signals for applications such as chaotic encryption and physical random number generation, by biasing the SL well above the lasing threshold [26][27][28]. Semiconductor lasers are compact and efficient light sources that offer several unique advantages including small size, fast response, low power consumption, and high efficiency [29,30]. SL-based TDRC systems can exhibit enhanced dynamical bandwidth emission in the presence of an additional optical injection signal [31,32].…”

Section: Introductionmentioning

confidence: 99%

Reservoir Computing and Task Performing through Using High-β Lasers with Delayed Optical Feedback

Wang¹,

Jiang²,

Fang³

et al. 2023

PIER

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Nonlinear photonic sources including semiconductor lasers have been recently utilized as ideal computation elements for information processing. They supply energy-efficient way and rich dynamics for classification and recognition tasks. In this work, we propose and numerically study the dynamics of complex photonic systems including high-β laser element with delayed feedback and functional current modulation, and employ nonlinear laser dynamics of near-threshold region for the application in time-delayed reservoir computing. The results indicate a perfect (100%) recognition accuracy for the pattern recognition task and an accuracy about 98% for the Mackey-Glass chaotic sequences prediction. Therefore, the system shows an improvement of performance with low-power consumption. In particular, the error rate is an order of magnitude smaller than previous works. Furthermore, by changing the DC pump, we are able to modify the number of spontaneous emission photons of the system, which then allows us to explore how the laser noise impacts the performance of the reservoir computing system. Through manipulating these variables, we show a deeper understanding on the proposed system, which is helpful for the practical applications of reservoir computing.

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Section: Introductionmentioning

confidence: 99%

Reservoir Computing and Task Performing through Using High-β Lasers with Delayed Optical Feedback

Wang¹,

Jiang²,

Fang³

et al. 2023

PIER

View full text Add to dashboard Cite

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Towards understanding two-level-systems in amorphous solids: insights from quantum circuits

2019

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Amorphous solids show surprisingly universal behaviour at low temperatures. The prevailing wisdom is that this can be explained by the existence of two-state defects within the material. The so-called standard tunneling model has become the established framework to explain these results, yet it still leaves the central question essentially unanswered -what are these two-level defects? This question has recently taken on a new urgency with the rise of superconducting circuits in quantum computing, circuit quantum electrodynamics, magnetometry, electrometry and metrology. Superconducting circuits made from aluminium or niobium are fundamentally limited by losses due to two-level defects within the amorphous oxide layers encasing them. On the other hand, these circuits also provide a novel and effective method for studying the very defects which limit their operation. We can now go beyond ensemble measurements and probe individual defects -observing the quantum nature of their dynamics and studying their formation, their behaviour as a function of applied field, strain, temperature and other properties. This article reviews the plethora of recent experimental results in this area and discusses the various theoretical models which have been used to describe the observations. In doing so, it summarises the current approaches to solving this fundamentally important problem in solid-state physics.

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Polarization-resolved cartography of light emission of a vertical-cavity surface-emitting laser with high space and frequency resolution

Cited by 2 publications

References 35 publications

Reservoir Computing and Task Performing through Using High-β Lasers with Delayed Optical Feedback

Reservoir Computing and Task Performing through Using High-β Lasers with Delayed Optical Feedback

Towards understanding two-level-systems in amorphous solids: insights from quantum circuits

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