Gain and Phase Dynamics of QD-VCSOA Under Electrical and Optical Pumping

Sahraee, Elham; Zarifkar, Abbas

doi:10.1109/jlt.2014.2354292

Cited by 4 publications

(4 citation statements)

References 18 publications

(37 reference statements)

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“…In the phase rate equation (1-e), the terms 0  and L  denote the primitive frequency corresponding to =1.55µm and the shifted frequency (chirped frequency) of the central longitudinal mode, respectively. Two main processes such as interband transitions (IB) and free carrier absorption (FC) lead to the refractive index changes and are described in the following subsections [23].…”

Section: A Rate Equations For Carriers Photons and Phasementioning

confidence: 99%

“…Based on Kramers-Kronig relation, the interband transitions of carriers at the WL, ES, and GS result into the refractive index change through the following equations [23]. …”

Section: A Refractive Index Changes Due To Interband Transitionsmentioning

confidence: 99%

“…Moreover, the plasma effect leads to refractive index change through free carrier absorption from the WL, ES, and GS and can be described by Drude model [23].…”

Section: B Refractive Index Changes Due To Free Carriers Absorptionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Modulation and Noise Characteristics in 1.55 µm QD Lasers using Additional Optical Pumping

Sanaee

Zarifkar

2017

IJOP

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ABSTRACT-The modulation response, relative intensity noise (RIN) and frequency noise (FN) characteristics of quantum dot (QD) lasers are investigated theoretically in the presence of an external optical beam. Using small signal analysis of the rate equations for carriers and photons, it is demonstrated that by injecting excess carriers into the QDs excited state through optical pumping, the modulation response of QD laser enhances and its bandwidth increases. The external optical pump also helps QD laser to turn on during shorter delay time. Further, it is deduced that the RIN level of QD laser reduces and the damping factor increases due to external beam. Moreover, the frequency noise level of QD laser and correspondingly its linewidth decreases by applying the optical beam.

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Section: A Rate Equations For Carriers Photons and Phasementioning

confidence: 99%

“…Based on Kramers-Kronig relation, the interband transitions of carriers at the WL, ES, and GS result into the refractive index change through the following equations [23]. …”

Section: A Refractive Index Changes Due To Interband Transitionsmentioning

confidence: 99%

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Enhanced Modulation and Noise Characteristics in 1.55 µm QD Lasers using Additional Optical Pumping

Sanaee

Zarifkar

2017

IJOP

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“…Vertical cavity semiconductor optical amplifiers (VCSOAs) are costeffective structures that satisfy these requirements and at the same time provide a platform for the realization of various functionalities. These include logic, amplification, switching, while both QW and QD gain structures have been studied [18,19].…”

Section: Introductionmentioning

confidence: 99%

Slow light in quantum dot vertical cavity semiconductor optical amplifiers

Mourkioti

Georgiou

Kamalakis

et al. 2019

Semicond. Sci. Technol.

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Slow light in the Technologically important devices InGaAs/GaAs quantum dot (QD) Vertical Cavity Semiconductor Optical Amplifiers (QD-VCSOAs) is studied. The presented work benefits from the possibility offered by QD-VCSOA structures for operation exclusively at the amplifying regime without reaching threshold unlike Quantum Well (QW) VCSOAs. The mathematical formulation of the main slow down metric based on gain dispersion is presented. The effects of various functional (current, input signal) and structural (inhomogeneity, cavity length, density of dots etc) properties on the optical delay properties of the QD-VCSOA are identified and relevant design strategies are outlined. The numerical investigation concludes that considerably higher Group Delays can be achieved in QD-VCSOAs compared to QW-VCSOAs by means of static (i.e. structural design) and dynamic (i.e. injection current) properties. The results highlight the flexibility (tunability) offered by the QDs in tailoring SL properties of the VCSOA.

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