Development of fiber optic probes and a dual wavelength laser system for medical applications

Simple item page
buir.advisorOrtaç, Bülend
dc.contributor.authorUzcengiz Şimşek, Elif
dc.date.accessioned2016-04-27T06:50:15Z
dc.date.available2016-04-27T06:50:15Z
dc.date.copyright2016-01
dc.date.issued2016-01
dc.date.submitted22-01-2016
dc.descriptionCataloged from PDF version of thesis.en_US
dc.descriptionIncludes bibliographical references (leaves 74-82).en_US
dc.descriptionThesis (M.S.): Bilkent University, Materials Science and Nanotechnology Program, İhsan Doğramacı Bilkent University, 2016.en_US
dc.description.abstractOptical fibers have been widely used in the past several decades due to their characteristics, such as laser energy transmission, low optical loss and different beam shape. These features make them advantegous for different applications in a number of fields such as telecommunication, imaging, laser cavity systems and medical applications. Fiber optic probes were developed to use optical fiber systems in medicine since they are exible, small in diameter, easy to use and they transmit the laser energy through the target tissue of the body without any additional optical alignment. The tip geometry of the fiber optic probes can be changed so that the laser radiation is emitted with different shapes. Flat-ended, side-firing, radial, double radial and diffusing fiber optic probes, having different beam shapes, were developed by using mechanical polishing and also, CO2 laser polishing technique was demonstrated for fining radial fiber tips for the first time throughout this study. The probes were analyzed in terms of ray tracing, Zemax modelling, fabrication and light de ection. As a result, the spatial distribution of the fabricated probes were optimized. Different beam shapes originating from each fiber optic probe can serve for specific purposes. One of them is to use the diffusing probe as a cladding light stripper (CLS) in the fiber laser cavity since it improves the beam quality of the fiber laser. On the other hand, endovenous laser ablation (EVLA) is one of the operations that at, radial and double radial probes are preferred for ablating the varicose vein re ux, which is a common disease seen in 25% of women and 15% of men in the USA. A dual-wavelength medical laser system (980nm-1470nm), operating both at continuous wave (cw) and pulsed wave (pw), was also developed and characterized in terms of spectrum, power and pulse duration. A whole medical laser system consisting of the home-made radial fiber optic probe and the dual-wavelength medical laser system was assembled. In conclusion, design, development and characterization of the fiber optic probes having different beam shapes were performed and two different applications, namely CLS and a dual-wavelength medical laser system, were presented.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2016-04-27T06:50:15Z No. of bitstreams: 1 MS_thesis_Elif Uzcengiz Şimşek_2012016_final.pdf: 19070949 bytes, checksum: d4694b09bb09078855d386cc27e3a4b4 (MD5)en
dc.description.provenanceMade available in DSpace on 2016-04-27T06:50:15Z (GMT). No. of bitstreams: 1 MS_thesis_Elif Uzcengiz Şimşek_2012016_final.pdf: 19070949 bytes, checksum: d4694b09bb09078855d386cc27e3a4b4 (MD5) Previous issue date: 2016-01en
dc.description.statementofresponsibilityby Elif Uzcengiz Şimşek.en_US
dc.embargo.release2018-01-22
dc.format.extentxvi, 82 leaves : illustrations (some colour), charts.en_US
dc.identifier.itemidB152701
dc.identifier.urihttp://hdl.handle.net/11693/28992
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectFiber optic probesen_US
dc.subjectCladding light strippersen_US
dc.subjectDual wavelength medical laser systemen_US
dc.subjectEndovenous laser ablation (EVLA)en_US
dc.titleDevelopment of fiber optic probes and a dual wavelength laser system for medical applicationsen_US
dc.title.alternativeMedikal uygulamalar için fiber optik problar ve ikili dalga boylu lazer sistemi geliştirilmesien_US
dc.typeThesisen_US
thesis.degree.disciplineMaterials Science and Nanotechnology
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
MS_thesis_Elif Uzcengiz Şimşek_2012016_final.pdf
Size:
18.19 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Graduate School of Engineering and Science