The dynamical complexity of optically injected semiconductor lasers

Wieczorek, Sebastian; Krauskopf, Bernd; Simpson, T. B.; Lenstra, D.

doi:10.1016/j.physrep.2005.06.003

Cited by 419 publications

(303 citation statements)

References 163 publications

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“…Lying within bubbles of highly-periodic oscillations there exist two regions of chaotic dynamics. The generation mechanisms of such chaotic regions can be manifold [WIE05]. For K = 0.3 we find a period-doubling route to chaos when increasing the detuning Δν inj from negative values outside of the period-2-oscillation region.…”

Section: ) 3 Quantum-dot Laser Dynamicsmentioning

confidence: 80%

“…Semiconductor lasers are known to exhibit a variety of different dynamics. This becomes apparent especially under external perturbations, e.g., of the pump current or by an external light field [TAR95a,WIE05], as well as under optical feedback [HEI01a,SOR13,OTT14]. Here, lasers can exhibit periodic oscillations, multi-stability [GAV97], and deterministic chaos [TAR98a,OHT99].…”

Section: Dt S(t) = 2g(n (T) − N 0 )S(t) − 2κs(t) (12b)mentioning

confidence: 99%

“…In general, a high value of α is related to highly complex dynamics, unstable laser operation, and a large laser linewidth. For example, in optical injection [WIE05,LIN13] or optical feedback setups [OTT10,LIN12b] the resulting bifurcation structure becomes largely more complex with increasing alpha. Furthermore, the minimum feedback strength required to introduce dynamical instabilities or chaos is lowered by α [LEV95,ERN10b,OTT14], which makes a diligent suppression of undesired reflections in optical setups necessary.…”

Section: Amplitude-phase Coupling In Quantum-dot Lasersmentioning

confidence: 99%

“…The nonlinear dynamics of semiconductor lasers under external optical perturbations have been subject of extensive experimental and theoretical studies in the past [WIE05,NAD09,KEL11a]. When the frequency of the injected signal is too large, the beating between the external and cavity fields can induce nonlinear oscillations [TRE85] as well as deterministic chaos [SIM94a], multi-stability [GAV97], or excitability close to the boundary of phase-locking [GOU07].…”

Section: Quantum-dot Laser Dynamicsmentioning

confidence: 99%

“…18. From this simple consideration, we can write the change of the average electric field amplitude in the laser cavity after one round-trip time due to the injected signal as [WIE05] …”

Section: Quantum-dot Laser Model With Optical Injectionmentioning

confidence: 99%

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Nonlinear and Nonequilibrium Dynamics of Quantum-Dot Optoelectronic Devices

Lingnau

2015

Springer Theses

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In this thesis the dynamics and performance of optoelectronic devices based on semiconductor quantum-dots are investigated.In the first part, the dynamics of quantum-dot lasers under external perturbations is discussed. Using a microscopically based balance equation model that incorporates detailed charge-carrier scattering dynamics and the possibility to describe nonequilibrium between intra-band electronic states, the relaxation oscillations of the quantum-dot laser are investigated. Three qualitatively different dynamic regimes are identified in dependence of the scattering rates -the "constantreservoir" regime for slow scattering, the "overdamped" regime, and the "synchronized" regime for high scattering -characterized by a varying degree of nonequilibrium between the quantum-dot and reservoir states.Important differences to conventional lasers are found in the modulation response and the dynamics in optical injection and feedback setups. Common theoretical models and approaches used to describe these applications are shown to yield inaccurate predictions, especially in the "constant-reservoir" and "overdamped" dynamic regimes. An important consequence is that the amplitude-phase coupling in quantum-dot lasers, commonly described by the α-factor, differs from conventional descriptions due to the desynchronization of gain and refractive index. While the α-factor describes bifurcations of fixed points accurately, it fails in describing dynamic solutions and overestimates the extent of complex dynamics. The observed low sensitivity to optical perturbations in quantum-dot lasers can therefore be attributed partly to the charge-carrier nonequilibrium. Three quantum-dot laser models on different levels of sophistication are presented that can accurately describe the quantum-dot nonequilibrium dynamics.In the second part of the thesis, the performance of quantum-dot semiconductor optical amplifiers is investigated, and two types of applications unique to quantum-dots as active medium are discussed. The ground and excited states of the quantum-dots allow an ultra-broad-band amplification of optical data streams. Amplified signals on the ground-state frequencies are shown to generally exhibit higher quality than on the excited state, due to a lower sensitivity of the groundstate to carrier-density variations. Nevertheless the quantum-dot amplifier is found to allow effective amplification on both frequency ranges. Furthermore, a parameter range is identified that allows for a simultaneous amplification of data signals on the ground and excited state in a counter-propagating setup.The long microscopically polarization dephasing times in quantum-dots are found to enable quantum-coherent interactions on a macroscopic scale at room-temperature. By comparison with experiments, the occurrence of Rabi-oscillations by amplification of ultra-short pulses is demonstrated. Quantum-dot based devices could therefore be used for future applications based on quantum-coherent effects.

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Section: ) 3 Quantum-dot Laser Dynamicsmentioning

confidence: 80%

Section: Dt S(t) = 2g(n (T) − N 0 )S(t) − 2κs(t) (12b)mentioning

confidence: 99%

Section: Amplitude-phase Coupling In Quantum-dot Lasersmentioning

confidence: 99%

Section: Quantum-dot Laser Dynamicsmentioning

confidence: 99%

“…18. From this simple consideration, we can write the change of the average electric field amplitude in the laser cavity after one round-trip time due to the injected signal as [WIE05] …”

Section: Quantum-dot Laser Model With Optical Injectionmentioning

confidence: 99%

See 3 more Smart Citations