Results 11 to 20 of about 1,993 (216)

Security-Enhanced Electro-Optic Mutual Injection Secure Communication Scheme With Time-Delay Signature Suppressing

open access: yesIEEE Photonics Journal, 2023
In this article, we propose and numerically demonstrate a novel dual-phase modulated time-delay signature (TDS) concealed communication system. The proposed system addresses the fatal disadvantage of conventional electro-optic chaotic systems in that TDS
Wenfu Gu   +6 more
doaj   +1 more source

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

open access: yesPhotonics, 2021
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.
Tingting Song   +6 more
doaj   +1 more source

Experimental investigations of Synchronization in two optically coupled chaotic systems utilizing optical feedback and optical injection [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2018
An experimentally observations of chaos synchronization have been investigated between two optically coupled laser diodes. Two schemes of optical injection, bidirectional and unidirectional optical injections have been used.
Salam K. Mousa   +2 more
doaj   +1 more source

AC/DC: The FERMI FEL Split and Delay Optical Device for Ultrafast X-ray Science

open access: yesPhotonics, 2022
Free-electron lasers (FELs) are the most advanced class of light-sources, by virtue of their unique capability to lase high-brightness pulses characterized by wavelengths spanning the extreme-ultraviolet, the soft and hard X-ray spectral domains, as well
Alberto Simoncig   +14 more
doaj   +1 more source

Optical Feedback Radiation Forces: Intracavity Optical Trapping with Feedback-locked Diode Lasers [PDF]

open access: yesFrontiers in Optics 2012/Laser Science XXVIII, 2012
We demonstrate a novel mechanism for optical tweezing, where a trapped particle dynamically alters an external cavity quality factor, reduceing the average intensity and photodamage, even employing low-numerical aperture lenses and wide fields-of-view.
Y Tuna   +5 more
openaire   +4 more sources

Effects of Power Split Ratio and Optical Delay Phase Tuning on Stabilization of Self-Mode-Locked Quantum-Dash Lasers Subject to Dual-Loop Optical Feedback

open access: yesIEEE Photonics Journal, 2020
In the present work, we report a path of RF stabilization versus delay subject to self-mode-locked (SML) two-section quantum-dash (QDash) lasers emitting at ∼1.55 μm and operating at ∼21 GHz repetition rate using a feedback ...
Haroon Asghar, John G. McInerney
doaj   +1 more source

Influence of Radiative and Non-Radiative Recombination Lifetimes and Feedback Strength on the States and Relative Intensity Noise of Laser Diode

open access: yesPhotonics, 2022
A systematic treatment of the influence of the optical feedback (OFB) and the ratio of the radiative and the non-radiative recombination lifetime (τr/τnr) on the relative intensity noise (RIN) and the system dynamics of a semiconductor laser (SL) is ...
Salah Abdulrhmann   +2 more
doaj   +1 more source

Application of Near-Infrared Optical Feedback Cavity Enhanced Absorption Spectroscopy (OF-CEAS) to the Detection of Ammonia in Exhaled Human Breath

open access: yesSensors, 2019
The qualitative and quantitative analysis to trace gas in exhaled human breath has become a promising technique in biomedical applications such as disease diagnosis and health status monitoring.
Zhifu Luo, Zhongqi Tan, Xingwu Long
doaj   +1 more source

Electrically injected parity-time symmetric distributed feedback laser diodes (DFB) for telecom applications

open access: yesNanophotonics, 2021
The new paradigm of parity-time symmetry in quantum mechanics has readily been applied in the field of optics with numerous demonstrations of exotic properties in photonic systems.
Brac de la Perrière Vincent   +4 more
doaj   +1 more source

All-optical versus electro-optical quantum-limited feedback [PDF]

open access: yesPhysical Review A, 1994
21 pages. This is an old (1994) paper, but one which I thought was worth posting because in addition to what is described in abstract it has: (1) the first formulation (to my knowledge) of quantum trajectories for an arbitrary (i.e. squeezed, thermal etc.) broadband bath; (2) the prediction of a periodic modification to the detuning and damping of an ...
Wiseman, H. M., Milburn, G. J.
openaire   +4 more sources

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