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Article
Four-Wave Mixing Conversion in QD SOA: reservoir effects

Authors: Riyam H. Ali --- Ahmed H. Flayyih
Journal: JOURNAL OF THI-QAR SCIENCE مجلة علوم ذي قار ISSN: 19918690 Year: 2017 Volume: 6 Issue: 3 Pages: 30-34
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

In this paper, it is present a model to simulate Four-wave mixing in quantum dot semiconductor optical amplifier, taking into account the influence of carrier heating at reservoir. The numerical calculations show that; the carrier heating relaxation at reservoir demonstrates a significant impact on excited state occupation probability, and opposite occurs with ground state. Also, the conversion efficiency is shown a good match with experiment data.


Article
Carrier Temperature In Quantum Dot Optical Amplifiers

Authors: Kadhem A. Kadhem --- Ahmed H. Flayyih
Journal: Journal of Education for Pure Science مجلة التربية للعلوم الصرفة ISSN: 20736592 Year: 2018 Volume: 8 Issue: 3 Pages: 151-160
Publisher: Thi-Qar University جامعة ذي قار

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Abstract

AbstractThe effect of increasing of carrier temperature in wetting layer of semiconductor optical amplifier hasbeen modeling. The occupation probability, carrier heating relaxation, spontaneous emission and freecarrier absorption have been included in our formalization. The numerical calculations showed theoccupation probability directly proportion with carrier heating time as a result of reduction of carrierdensity in wetting layer. Also, the reservoir carrier temperature is directly proportional with the fullwidth at half maximum of injected pulse and carrier heating lifetime. The numerical calculations thatare showed; the carrier heating in the rate equations satisfies the thermal equilibrium between thelattice and carriers.


Article
Carrier Heating Effects in Quantum Dot Semiconductor Optical Amplifiers
تأثيرات الحاملات الحرارية في المضخمات البصرية الشبة موصلة الكمية النقطية

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Abstract

In this paper, we are introduce a new model to simulate the influence of carrier heating in quantum dot optical amplifiers. depending on density matrix theory, rate equations for two-level and the analytical solution of pulse propagation in quantum dot (QD) the nonlinear gain coefficient due carrier heating has been derive. The effects of energy splitting, detuning, carrier density and time of spectral hole burning versus nonlinear gain coefficient have been investigated.Also, the time recovery of ground state (GS) with carrier heating effects hasbeen calculated, the resultsshows a good agreement with research.

في هذا البحث نقدم نموذج جيد لمحاكاة تأثير حرارة الحاملات في المضخم البصري شبة الموصل النانوي.بالاعتماد على نظرية كثافة المصفوفة و معادلات التغير الزمني لنظام مستويين. و أن نموذج الحل التحليلي لسريان النبضات في النقط الكمية. ان معاملات الربح اللاخطية بسبب حرارة الحاملات مشتق. كذلك زمن الاستعادة بوجود تأثير حرارة الحاملات تم حسابه و النتائج توضح توافق جيد مع البحوث العالمية .

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