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العنوان
Optical Fiber Sensors \
المؤلف
Afifi,Abdelrahman Emad El-Din Hussien Mohamed
هيئة الاعداد
باحث / عبدالرحمن عمادالدين حسين محمد عفيفي
مشرف / محمود حنفي احمد
مشرف / طارق عبدالعظيم رمضان
مناقش / كامل محمد محمود حسن
تاريخ النشر
2016.
عدد الصفحات
130p.:
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الكهربائية والالكترونية
تاريخ الإجازة
1/1/2016
مكان الإجازة
جامعة عين شمس - كلية الهندسة - قسم الالكترونيات والاتصالات
الفهرس
Only 14 pages are availabe for public view

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Abstract

Polarization Maintaining fibers (PMFs) are gaining more interest in fiber optic sensors such as current, rotation rate ... etc as well as high performance optical links. Thus accurate hands on characterization of PMFs is required for the evaluation of its per- formance. Optical Coherence Domain Polarimetry (OCDP) is the main method for measuring not only the polarization mode coupling distributed along PMFs under test but also the group birefringence and group birefringence dispersion.
This thesis presents an all PM fiber Michelson interferometer using single PM fiber loop mirror (FLM) instead of free space mirrors for OCDP applications. The system in this thesis offers simpler setup realization and lower cost compared to free space one. Thermal variation of the two fiber arms delay difference of the Michelson interferometer is partially overcome by fitting one arm with Piezo-electric fiber stretcher driven near resonance. The analytical model of the PM fiber interferometer is developed as well as a set of experimental results to demonstrate its operation.
Also, in this thesis an all-fiber OCDP setup is built for polarization mode coupling measurements in PMFs. PMF parameters such as group birefringence and group bire- fringence dispersion are also measured using the proposed system. The performance limitations of the new setup are estimated theoretically and verified experimentally. The limitations of this proposed system are deviation of the splitting ratio of the PM couplers from 50/50 and finite polarization extinction ratio (PER) of the fiber compo- nents used.