3D pulsed chaos lidar system

Cheng, Chun-Wen; Chen, Chih‐Ying; Chen, Junda; Pan, Da-Kung; Ting, Kai-Ting; Lin, Fan-Yi

doi:10.1364/oe.26.012230

Cited by 88 publications

(36 citation statements)

References 21 publications

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“…Semiconductor lasers subjected to optical feedback are known to exhibit a diverse range of rich nonlinear effects such as low-frequency fluctuations [1], self-pulsation [2], and chaos [3][4][5][6][7][8]. Primarily regarding the traditionally undesirable chaotic output, various fields have used it to their advantage and found its application in LIDAR [3,9], random number generation [4], optical cryptography [5] and secure communication [6]. In the context of optical feedback generated chaos, increased spatiotemporal complexity along with high chaos BW provides a truly secure system for communication.…”

mentioning

confidence: 99%

Spatiotemporal complexity of chaos in a phase-conjugate feedback laser system

Malica¹,

Bouchez²,

Wolfersberger³

et al. 2020

Opt. Lett.

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An 852 nm semiconductor laser is experimentally subjected to phase-conjugate time-delayed feedback achieved through four-wave mixing in a photorefractive (BaTiO 3 ) crystal. Permutation entropy (PE) is used to uncover distinctive temporal signatures corresponding to the sub-harmonics of the round-trip time and the relaxation oscillations. Complex spatiotemporal outputs with high PE mostly upwards of ∼0.85 and chaos bandwidth (BW) up to ∼31 GHz are observed over feedback strengths up to 7%. Low feedback region counterintuitively exhibits spatiotemporal reorganization and the variation in the chaos BW is restricted within a small range of 1.66 GHz; marking the transition between the dynamics driven by the relaxation oscillations and the external cavity round-trip time. The immunity of the chaos BW and the complexity against such spatiotemporal reorganization shows promise as an excellent candidate for secure communication application.

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mentioning

confidence: 99%

Spatiotemporal complexity of chaos in a phase-conjugate feedback laser system

Malica¹,

Bouchez²,

Wolfersberger³

et al. 2020

Opt. Lett.

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“…While a GS laser is of large importance for the development of isolator-free transmitters in short-reach networks, an ES laser on the other hand can be essential for applications taking advantages of chaos such as chaos lidars, chaos radars, and high-speed random number generations. [15][16][17][18] From these results it is obvious that, although the GS and ES lasers have the same active medium, their response to the feedback are very different. Unlike the ES laser, the carrier dynamics of the GS laser involves transport, capture, and relaxation, leading to a larger damping rate that stabilizes the laser and prevents the development of complex dynamics.…”

Section: Resultsmentioning

confidence: 99%

Recent advances in InAs/GaAs quantum dot lasers with short optical feedback

Grillot

Huang

Lin

et al. 2018

Semiconductor Lasers and Laser Dynamics VIII

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The optical feedback dynamics of two multimode InAs/GaAs quantum dot lasers emitting exclusively on sole ground or excited lasing states is investigated under the short delay configuration. Although the two lasers are made from the same active medium, their responses to the external perturbation are found not much alike. By varying the feedback parameters, various periodic and chaotic oscillatory states are unveiled. The ground state laser is found to be much more resistant to optical feedback, benefiting from its strong relaxation oscillation damping. In contrast, the excited state laser can easily be driven into very complex dynamics. While the ground state laser is of importance for the development of isolator-free transmitters, the excited one is essential for applications taking advantages of chaos such as chaos lidar, chaos radar, and random number generation.

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“…There are two main methods being explored to achieve this, chaotic lidar and MEMS lidar. Chaotic lidar has excellent anti-jamming and antiinterference properties [11]. While not the newest idea, as it dates back at least to 2004 [37], feasible implementations remain an open question.…”

Section: Lidarmentioning

confidence: 99%

On Sensor Security in the Era of IoT and CPS

Panoff

Dutta

et al. 2021

SN COMPUT. SCI.

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Sensors play an integral role in numerous devices across a diverse range of domains. While cyber-physical systems and the Internet of things use them extensively, sensors can also be commonly found in many standalone electronic devices. Concerns over the susceptibility of sensors to malicious attacks have led academia to focus on the security of these sensors. To help unite these efforts, we propose a lexicon to easily differentiate between types and methods of attacks on sensors. Using these definitions, one can quickly and clearly understand the method and the target of an attack. We examine the most recent and influential attacks on sensors, especially when they are acting as edge nodes of systems, as well as defenses against said attacks. We then seek to categorize these methods according to our lexicon, demonstrating its usefulness and solidifying the meaning of proposed terms.

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3D pulsed chaos lidar system

Cited by 88 publications

References 21 publications

Spatiotemporal complexity of chaos in a phase-conjugate feedback laser system

Spatiotemporal complexity of chaos in a phase-conjugate feedback laser system

Recent advances in InAs/GaAs quantum dot lasers with short optical feedback

On Sensor Security in the Era of IoT and CPS

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