مشاركة
دراسة مقارنة بين ليزرات الابار الكمية والنقاط الكمية == Comparative Study Between Quantum Wells and Quantum Dots Lasers
اسم المؤلف:
وطن حمود جبر
اسم المشرف:
جاسب عبد الحسين مشاري
الموضوع العام:
علوم الفيزياء
السنة:
2015
الموضوع الدقيق:
فيزياء الليزر والكهروبصريات
الدرجة:
ماجستير
الجامعة:
جامعة البصرة
اللغة:
العربية
مكان الجامعة:
البصرة
الصفحات الاولى:
26T1694 - p.pdf
المستخلص:
In the work we present a comprehensive comparison between the dynamics of quantum well and quantum dot semiconductor lasers working autonomously using two models, the first describe the temporal variation of carriers and photon densities respectively in the quantum well lasers and the second describe the carriers occupancies in the wetting layer and quantum dot and photon occupancy in the quantum dot lasers .The study was carried out on the delay time and level of the dc part of their power under the effect of the many parameters that appeared in those models. Both lasers dynamics were studied in the presence of injection current modulation which enhances lasers power range from periodic to chaotic one with varieties of periodic states such as period.1, period.2, period.3, period.4 and period.6. Developed chaos was noticed to occur.We propose and investigate a simple method to obtain complex output power from both lasers via pulse shaping of the injection current. During the three methods studied we noticed similarities and discrepancies in both lasers dynamics.
