Search query: Application of external cavity semiconductor lasers in optical chaos communications

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abstract: This paper provides an overview of experimental and theoretical work undertaken in the authors' laboratory and directed at the development of optical chaos communications technology. The specific focus of the paper is on the use of external cavity edge emitting semiconductor lasers for this purpose. Applications to networked chaotic communications will be highlighted.
author_names: K Alan Shore

M W Lee

Jon Paul

Y Hong
title: Application of external cavity semiconductor lasers in optical chaos communications
venue: 2007 Conference on Lasers and Electro Optics Pacific Rim
year: 2007

abstract: It is demonstrated that tailored optoelectronic feedback can be used to selectively excite periodic dynamical output from external cavity semiconductor lasers undergoing a period doubling bifurcation cascade on the route to the chaotic coherence collapse regime. The optoelectronic feedback can effectively suppress or invert the bifurcation sequence so that low order periodic motion can be resonantly excited from high order periodic or chaotic dynamics. The application of the technique in chaotic optical communications and its role in chaos control are discussed.
author_names: Sergei Turovets

Jaume Dellunde

K Alan Shore
title: Optoelectronic feedback control of laser diodes for chaotic optical communications
venue: Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference
year: 1996

abstract: It is demonstrated that tailored optoelectronic feedback can be used selectively to excite periodic dynamical output from external cavity semiconductor lasers undergoing a period doubling bifurcation cascade on the route to the chaotic coherence collapse regime. The optoelectronic feedback can effectively suppress or invert the bifurcation sequence so that low order periodic motion can be resonantly excited from high order periodic or chaotic dynamics. The robustness of coherence collapse control to intrinsic laser diode noise is investigated. The application of the technique in chaotic communications and its role in chaos control are discussed.
author_names: Sergei Turovets

Jaume Dellunde

K Alan Shore
title: Nonlinear dynamics of a laser diode subjected to both optical and electronic feedback
year: 1997

abstract: An external cavity semiconductor laser (ECSL) outputs high dimensional chaos, which has potential for various applications, but the unwanted time delay signature (TDS) might compromise the performance. In this work, a highly integrated and extensible framework of phased array semiconductor lasers, operating in a steady state when isolated, is employed to postprocess the original chaos generated by an ECSL. Our results demonstrate that such a compact active device enables TDS suppression over wide parameter space. Better performance can be achieved in the proposed scheme compared with the conventional, discrete semiconductor laser subjected to optical chaotic injection. The influence of the injection parameters and the laser separation is studied, which further confirms the feasibility of the proposed scheme for TDS suppression. The phased array can be readily extended to include a large number of elements, and thus the current scheme allows for the generation of multiple independent chaotic signals with no discernible TDS in parallel. This means that the current study may pave the way for parallel random number generation based on optical chaos.
author_names: Pei Zhou

Qi Fang

Nianqiang Li
title: Phased array assisted time delay signature suppression in the optical chaos generated by an external cavity semiconductor laser
year: 2020

abstract: Quantum cascade lasers (QCLs) are unipolar semiconductor lasers offering access to wavelengths from the mid infrared (IR) to the terahertz domain and promising impact on various applications such as free space communications, high resolution spectroscopy, LIDAR remote sensing or optical countermeasures. Unlike bipolar semiconductor lasers, stimulated emission in QCLs is obtained via electronic transitions between discrete energy states inside the conduction band. Recent technological progress has led to QCLs operating in pulsed or continuous wave mode, at room temperature in single or multi mode operation, with high powers up to a few watts for mid IR devices. This spectacular development raises multiple interrogations on the stability of QCLs as little is known on their dynamical properties. Very recently, experiments based on optical spectrum measurements have unveiled the existence of five distinct feedback regimes without, however, identifying the complex dynamics dwelling within the QCL. In this article we provide the first experimental evidence of a route to chaos in a QCL emitting at mid IR wavelength. When applying optical feedback with an increasing strength, the QCL dynamics bifurcate to periodic dynamics at the external cavity frequency and later to chaos without an undamping of relaxation oscillations, hence contrasting with the well known scenarios occurring in interband laser diodes.
author_names: Frederic Grillot

Louise Jumpertz

K Schires

Mathieu Carras

Marc Sciamanna
title: Deterministic temporal chaos from a mid infrared external cavity quantum cascade lasers
venue: SPIE OPTO
year: 2016

author_names: John G McInerney
title: Development of optical chaos through self pulsations in external cavity semiconductor lasers
year: 1991

abstract: We propose and numerically demonstrate the generation of wideband millimeter wave (mmW) flat chaos with controllable power spectrum by injection of chaotic signal from external cavity semiconductor laser (ECSL) into optical time lens with noise phase modulation. Simulation results indicate consistent elimination of the ECSL relaxation oscillation frequency domination over the RF spectrum for large scale parameters of the optical time lens module and a wideband flat chaos, whose efficient bandwidth rapidly increases with the bandwidth of the noise signal driving the phase modulator and phase modulation index. Besides, we show that the time delay signature suppression can be concurrently achieved for moderate values of the noise bandwidth and phase modulation index. The proposed wideband mmW flat chaos exhibits great potential applications for ultrahigh speed chaos communications, mmW radars and macroscopic mmW noise source required for mmW research and design.
author_names: Romain Zinsou

Pu Li

Zhensen Gao

Yanhui Sun

Yuncai Wang
title: Wideband Millimeter Wave Flat Chaos Generation With Controllable Power Spectrum Using Optical Time Lens
venue: IEEE Photonics Journal
year: 2021

abstract: The optical feedback dynamics of two multimode InAs/GaAs quantum dot lasers emitting exclusively on sole ground or excited lasing states is investigated. The transition from longto short delay regimes is analyzed, while the boundaries associated to the birth of periodic and chaotic oscillations are unveiled to be a function of the external cavity length. The results show that depending on the initial lasing state, different routes to chaos are observed. These results are of importance for the development of isolator free transmitters in short reach networks. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement OCIS codes: (140.5960) Semiconductor lasers; (250.0250) Optoelectronics; (190.3100) Instabilities and chaos. References and links 1. C. F. Lam, H. Liu, and R. 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author_names: H Uang

IN LYU-CHIHL

Christian Hen

D Ejan A Rsenijevic

D Ieter B Imberg

F Rederic G Rillot
title: Multimode optical feedback dynamics in InAs GaAs quantum dot lasers emitting exclusively on ground or excited states transition from short to long delay regimes
year: 2018

abstract: Quantum cascade lasers (QCLs) exploit radiative intersubband transitions within the conduction band of semiconductor heterostructures. The wide range of wavelengths achievable with QCLs, from mid infrared to terahertz range, leads to a large number of applications including absorption spectroscopy, optical countermeasures and free space communications requiring stable single mode operation with a narrow linewidth, high output power and high modulation bandwidth. Prior work has unveiled the occurrence of temporal chaos in a QCL subjected to optical feedback, with a scenario involving oscillations at the external cavity frequency and low frequency fluctuations. The purpose of this work is to further investigate the temperature dependence of a mid infrared QCL with optical feedback. When the semiconductor device is cooled down to 170K, experiments unveil that the laser destabilization appears at a lower feedback ratio and that the chaotic bubble slightly expands owing to a different carrier lifetime dynamics. These results are of paramount importance for new mid infrared applications such as chaos encrypted free space communications or unpredictable countermeasures.
author_names: Olivier Spitz

Jiagui Wu

Sudeep Khanal

Mathieu Carras

Benjamin S Williams

C W Wong

Frederic Grillot
title: Temperature dependence of a mid infrared quantum cascade laser with external optical feedback
venue: OPTO
year: 2018

abstract: A simple method of targeting periodic dynamics appearing in semiconductor lasers subject to optical feedback is demonstrated. Possible applications of the technique in chaotic communications are identified, and its advantages for chaos control are discussed.
author_names: Lloyd N Langley

Sergei Turovets

K Alan Shore
title: Targeting periodic oscillations of external cavity laser diodes.
venue: Optics letters
year: 1995