Quantum dot semiconductor optical amplifiers: optical pumping versus electrical pumping

Baghban, Hamed; Oliaee, R; Yadipour, Reza; Rostami, Ali

doi:10.1088/2040-8978/13/3/035406

Cited by 21 publications

(12 citation statements)

References 19 publications

(28 reference statements)

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“…The onset of ES lasing is accompanied by a sudden change of the light field oscillating in the QD device, which does not influence the GS recovery. Although the enhanced light field could potentially act as an additional optical carrier reservoir feeding the QD states after GS carrier depletion, 40,41 no further decrease of the GS gain recovery rate is observed. We conclude that the recovery is rather governed by the present ES carrier population which reacts only weakly to crossing the laser threshold.…”

mentioning

confidence: 99%

Gain dynamics of quantum dot devices for dual-state operation

Kaptan

Schmeckebier

Herzog

et al. 2014

Applied Physics Letters

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Ground state gain dynamics of In(Ga)As-quantum dot excited state lasers are investigated via single-color ultrafast pump-probe spectroscopy below and above lasing threshold. Two-color pump-probe experiments are used to localize lasing and non-lasing quantum dots within the inhomogeneously broadened ground state. Single-color results yield similar gain recovery rates of the ground state for lasing and non-lasing quantum dots decreasing from 6 ps to 2 ps with increasing injection current. We find that ground state gain dynamics are influenced solely by the injection current and unaffected by laser operation of the excited state. This independence is promising for dual-state operation schemes in quantum dot based optoelectronic devices. V C 2014 AIP Publishing LLC. [http://dx.

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confidence: 99%

Gain dynamics of quantum dot devices for dual-state operation

Kaptan

Schmeckebier

Herzog

et al. 2014

Applied Physics Letters

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“…Theoretical studies have proven distinctive superiorities of optically pumped QD-SOAs (OP-QDSOAs) over their conventional counterparts, i.e. EP-QDSOAs [9,10]. Based on these studies, the gain and phase recovery time in an OP-QDSOA can be much less than that in an EP-QDSOA.…”

Section: Introductionmentioning

confidence: 99%

Sub-Nanosecond Phase Recovery in Quantum-Dot Semiconductor Optical Amplifiers

Abedi

Taleb

2013

Acta Phys. Pol. A

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In this paper, optimal design of a pumping scheme for achieving the best gain and phase response in quntum--dot semiconductor optical ampliers is investigated. For the rst time, the dynamic response of the quntum-dot semiconductor optical amplier is evaluated under three dierent pumping schemes, known as optical pumping, electrical pumping, and electro-optical pumping. Simulation results show that the shortest gain recovery time in quntum-dot semiconductor optical ampliers can be achieved under the electrical pumping scheme. However, under the optical pumping and electro-optical pumping schemes, the quntum-dot semiconductor optical amplier represents a shorter phase recovery compared to the electrical pumping scheme. We found that a sub-nanosecond phase recovery in the quntum-dot semiconductor optical amplier can be achieved under the OP and electro--optical pumping schemes, which can never be achieved under the electrical pumping, because of the slow carrier dynamics of the carrier reservoir. Also, it was found that the gain recovery process in an optically pumped quntum-dot semiconductor optical amplier can be signicantly accelerated at cryogenic temperatures. This result demonstrates the superiorities of the optical pumping scheme over the electrical pumping and electro-optical pumping schemes at low temperatures, where both the gain and phase recovery times of an optically pumped quantum-dot semiconductor optical amplier are drastically decreased.

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“…Currently, most researches in the field of QD‐SOAs have been concentrated on the EP. In recent years, use of OP for QD‐SOAs has attracted the attention of some researchers [15, 16]. It has been proven that injecting a sufficiently intense pump signal into the active region is an efficient technique for accelerating the dynamic response of QD‐SOAs [16].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, use of OP for QD‐SOAs has attracted the attention of some researchers [15, 16]. It has been proven that injecting a sufficiently intense pump signal into the active region is an efficient technique for accelerating the dynamic response of QD‐SOAs [16]. Since there are a few works in the literature on the topic of employing OP for QD‐SOAs, complementary research efforts are needed to improve the efficiency and performance of OP schemes.…”

Section: Introductionmentioning

confidence: 99%

Design of optical pumping scheme for quantum‐dot semiconductor optical amplifiers

Taleb

Abedi

2013

IET Optoelectronics

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In this study, design of optical pumping (OP) scheme for quantum-dot semiconductor optical amplifiers (QD-SOAs) is investigated. To evaluate the static and dynamic responses of the QD-SOA under OP, a non-linear state-space model is derived in which the effects of the homogeneous and inhomogeneous broadening of the gain medium and the spectral dependence of the input signals are taken into account. Using this model, the effects of the wavelength and power of the pump signal and the homogeneous and inhomogeneous linewidths are studied in detail. Simulation results demonstrate that optimal operation of the QD-SOA under the OP scheme is realised if the detuning between the pump wavelength and the input signal wavelength is constant (around 100 nm for our investigated device). The authors found that OP scheme can be employed for non-linear signal processing applications, where the superiorities of the OP against the electrical pumping appear for small values of the homogeneous and inhomogeneous linewidths.

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Quantum dot semiconductor optical amplifiers: optical pumping versus electrical pumping

Cited by 21 publications

References 19 publications

Gain dynamics of quantum dot devices for dual-state operation

Gain dynamics of quantum dot devices for dual-state operation

Sub-Nanosecond Phase Recovery in Quantum-Dot Semiconductor Optical Amplifiers

Design of optical pumping scheme for quantum‐dot semiconductor optical amplifiers

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