Phase Recovery Acceleration in Quantum-Dot Semiconductor Optical Amplifiers

Abedi, Kambiz; Taleb, Hussein

doi:10.1109/jlt.2012.2190710

Cited by 23 publications

(37 citation statements)

References 27 publications

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“…The eect of the carrier reservoir is modeled by considering a many-fold degenerate energy level in the energy band diagram, which is designated with the QW state.To evaluate the dynamic response of the device, we need a dynamical model for the QD-SOA. For this purpose, we have derived a nonlinear state space model (NSSM) for the device in which the average values of the carrier occupation probabilities are the state variables of the system [12]. 3.…”

Section: Physical Structure Of the Qd-soamentioning

confidence: 99%

“…Under the OP, three dierent pumping powers are considered: P pump = 50, 100, and 200 mW. These optical powers are corresponding to the injection current densities of J = 1, 2, and 4 kA/cm 2 under the EP [12]. Also, the injection current density under the optimal EOP is J = 346 A/cm 2 , which is corresponding to P elec = 34.6 mW.…”

Section: Physical Structure Of the Qd-soamentioning

confidence: 99%

“…The dy- * corresponding author; e-mail: k_abedi@sbu.ac.ir namic model which is employed to evaluate the response of the QD-SOA is based on the state space theory for SOAs [11,12].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Physical Structure Of the Qd-soamentioning

confidence: 99%

Section: Physical Structure Of the Qd-soamentioning

confidence: 99%

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

Abedi

Taleb

2013

Acta Phys. Pol. A

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“…In (1c) and (1d), P k,in and E k = h − v k are the input optical power and the energy of the kth photon mode, the term Γ is the optical confinement factor. In (1c) and (1d), the linear material gain at frequency ω k is given by [23] …”

Section: Introductionmentioning

confidence: 99%

“…where the term L g(e) j is the HB function, the term G s j is the fraction of the radiative recombination of the jth QD group [23]. The term kê p cv 2 l is the momentum matrix element of QDs, |M env | 2 represents the envelope function overlap between QD electron and hole states, n r is the refractive index of the material, N D is the QDs volume density and V d = l D AL H is the active region volume.…”

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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