{"id":190,"date":"2022-12-08T08:16:57","date_gmt":"2022-12-08T08:16:57","guid":{"rendered":"https:\/\/en.ilps.uobaghdad.edu.iq\/?p=190"},"modified":"2022-12-22T07:16:05","modified_gmt":"2022-12-22T07:16:05","slug":"discussion-of-the-thesis-of-the-masters-student-ahmed-athafa-laser-applications-electronic-and-communication-engineering","status":"publish","type":"post","link":"https:\/\/en.ilps.uobaghdad.edu.iq\/?p=190","title":{"rendered":"Discussion of the thesis of the master’s student, Ahmed Athafa, laser applications, electronic and communication engineering"},"content":{"rendered":"

\u00a0<\/strong><\/p>\n

The Institute of laser for Postgraduate Studies discussed the thesis of the master’s student Ahmed Athafa Karim \/ laser applications \/ electronic and communication engineering for his study entitled<\/p>\n

-Optical pulse compression using etched Polarization Maintaining Fiber based Mach-Zehnder Interferometer Optical pulse compression using polarization-based fiber gravure On the Mach-Zeander interferometer<\/span><\/p>\n

The discussion committee consisted of the gentlemen whose names are listed:<\/p>\n

1- Asst. Prof. Dr. Shelan Khosrow Tawfiq\/ PhD, Laser_Electronic and Communication Engineering, Electronic and Communication Engineering, The Institute of laser for Postgraduate Studies, University of Baghdad, Chairperson<\/p>\n

2- Asst. Prof. Dr. Sarah Kazem Mohsen \/ PhD in Laser Engineering and Optoelectronics \/ Laser \/ Electronic and Communication Engineering \/ University College of Heritage \/ Member<\/p>\n

3- Inst. Dr. Zeina Abbas Abdel Saleh \/ PhD. Electronic and Communications Engineering \/ Electronics and Electricity \/ Khawarizmi Engineering \/ Department of Information and Communications Engineering \/ University of Baghdad \/ Member<\/p>\n

4- Asst. Prof. Dr. Tahrir\u00a0 Safaa Mansour \/ PhD. Laser\/Electronic and Communications Engineering\/The Institute of laser for Postgraduate Studies\/University of Baghdad\/member and supervisor<\/p>\n

Where, the aim of the study was to construct an optical signal compressor from an interfering unshelled optical fiber with zero polarization.<\/p>\n

The message was included in this study:<\/p>\n

-Laser pulse compression is an important technology in high data rate optical communication systems, especially in fiber optic network sensor systems. In this work, a pulse compressor was built using Polarization-maintained fiber-based Mach-Zender interferometer (PMF-MZI) with different configurations: single, cascading, nested, and mixed-nested. The first structure with PMF drilled with variable lengths of 8, 16, 24 cm and an etching time of 30 minutes immersed in hydrofluoride acid.<\/p>\n

(HF) (At a concentration of 40%). The second hull was made using PMF etched with a fixed length of 10 cm and a third drilling times 10, 20, 30 minutes, which corresponds to the fiber diameters (1.112, 3.88, 8.72) micrometers, respectively. The PMF is soldered between two segments of single-mode fiber (SMF) (10m long).cm. Four water samples were used (sea water, shallow water, coastal water, and distilled water), as a surrounding medium. Cascading single MZI and Sagnac interleaved were investigated using a laser source 7.1546 nm pulse with a full-width half-width maximum (FWHM) of 286 pm and a pulse duration of 9 ns. In this work, the stress factor (FC) is the figure of merit that decides the performance of the designed systems. It was completed obtaining the optimal value of FC = 1.1 using a single MZI-PMF and 24 cm, cladding thickness 8.72 \u00b5m of PMF fiber and shallow water as surrounding medium. The second configuration created by the PMF-MZI of 1.18, is the FC of the third value. Distilled water FC = 1.5 cascading displays of PMF-MZI interleaved seawater with a length of 10 cm of PMF fibers. In a hybrid Sagnac interferometer, consisting from a nested MZI-PMF, fixed-length FC = 5.1 PMF with seawater.<\/p>\n

Among the most important recommendations of the study:<\/p>\n

-Modern optical communications require a narrow optical source with a specific spectrum that does not interfere with the optical source of the adjacent user. Therefore, optical fiber interferometers were built using polarization-conserving, de-shelled optical fibers of different thicknesses.<\/p>\n

The lowest signal compression factor was obtained in the case of single interfering, and its value was 1.1<\/p>\n

While its value was 1.5 in the case of the interlocking and interlocking sanyak type, as well as the mixed grid interlocking sanyak type.<\/p>\n

\u00a0<\/strong><\/p>\n

\"\"\u00a0<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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