{"id":2611,"date":"2025-09-17T10:07:29","date_gmt":"2025-09-17T10:07:29","guid":{"rendered":"https:\/\/en.ilps.uobaghdad.edu.iq\/?p=2611"},"modified":"2025-09-18T07:38:48","modified_gmt":"2025-09-18T07:38:48","slug":"the-institute-of-laser-for-postgraduate-studies-discusses-the-thesis-of-student-dina-nemat-abdullah-laser-applications","status":"publish","type":"post","link":"https:\/\/en.ilps.uobaghdad.edu.iq\/?p=2611","title":{"rendered":"The Institute of Laser for Postgraduate studies discusses the thesis of student Dina Nemat Abdullah \/ Laser Applications"},"content":{"rendered":"
The Master’s thesis entitled “D-Shape Optical Fiber Coated with Gold Nanoparticles for Refractive Index Sensing” discussed by student Dina Nemat Abdullah under the supervision of Asst.Prof. Dr. Hanan Jafar Tahir.<\/span><\/h6>\n
This research aims to design and fabricate a refractive index (RI) sensor by developing a D-shaped fiber optic sensor. This sensor is characterized by a simple manufacturing process and the use of low-cost equipment. It is compact and based on the side polishing of a specific length of coreless fiber (CF) in a structure consisting of single-mode fibers – coreless fibers – single-mode fibers (SCS), which relies on the principle of Mach-Zehnder interferometer (MZI).<\/span><\/h6>\n
The sensor was designed to detect different concentrations of solutions with refractive indices ranging from 1.33 to 1.38. This study investigated various properties of the D-shaped fiber optic sensor, including the effect of polishing depths (PD) and polishing lengths (DSCFL) on the sensor’s sensitivity.<\/span><\/h6>\n
To enhance sensitivity, the sensor underwent a coating process with a thin layer of gold nanoparticles (Au-NL) with varying thicknesses, and the effects of these films on the sensor’s properties were comprehensively studied, including linearity, sensitivity, limit of detection (LOD), and accuracy.<\/span><\/h6>\n
The results showed that the sensor coated with a 50 nm gold nanolayer exhibited remarkable sensitivity, reaching 228.5 nm\/RIU, with a refractive index accuracy of 8.753\u00d710\u22125 RIU and an impressive linear regression coefficient (R\u00b2) of 98.29%.<\/span><\/h6>\n
The future of (DSCF) sensors with gold nanolayers (Au-NL) looks promising due to their exceptional sensitivity, stability, linearity, and repeatability, making them potentially suitable for biological, chemical, and environmental pollution applications.<\/span><\/h6>\n
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The Master’s thesis entitled “D-Shape Optical Fiber Coated with Gold Nanoparticles for Refractive Index Sensing” discussed by student Dina Nemat … <\/i>more<\/span><\/a><\/p>\n","protected":false},"author":36,"featured_media":2627,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[20,4,7,16],"tags":[],"class_list":["post-2611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sdg4","category-latest-news","category-news","category-sustainability"],"yoast_head":"\nThe Institute of Laser for Postgraduate studies discusses the thesis of student Dina Nemat Abdullah \/ Laser Applications - Institute of laser for Postgraduate Studies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/en.ilps.uobaghdad.edu.iq\/?p=2611\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Institute of Laser for Postgraduate studies discusses the thesis of student Dina Nemat Abdullah \/ Laser Applications - 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