An interferometric vibration sensor based on a four - core optical fiber
| dc.contributor | Graduate Program in Physics. | |
| dc.contributor.advisor | İnci, Naci. | |
| dc.contributor.author | Gökbulut, Belkıs. | |
| dc.date.accessioned | 2023-03-16T10:37:13Z | |
| dc.date.available | 2023-03-16T10:37:13Z | |
| dc.date.issued | 2016. | |
| dc.description.abstract | In this thesis, an interferometric fiber optic vibration sensor based on a four-core optical fiber is described. When the light is coupled into the four cores, each core acts as a mutually coherent waveguide with the other ones, which allows obtaining an interference fringe pattern at the far field. Vibrating a section of the four-core optical fiber causes a path difference between the light beams guiding in the separate cores, which results in a shift in the fringe pattern. Such a mechanism allows one to relate the fringe shift to the vibration amplitude and frequency. In this study, a source, which is capable to generate 100 Hz frequency sound waves is attached to the optical fiber to maintain vibration of the section of the fiber. A single slit and a photodetector are used to detect the shifting of the fringe pattern that causes a change in the phase of the guiding light. When a He-Ne laser beam is coupled into the optical fiber, the structured fringe pattern is projected onto the slit behind the photodetector, then a small part of the fringe pattern is analysed. Thus, an interferometric fiber optic vibration sensor based on a four-core optical fiber, which has a simple structure and high sensitivity, is accomplished. | |
| dc.format.extent | 30 cm. | |
| dc.format.pages | xii, 44 leaves ; | |
| dc.identifier.other | PHYS 2016 G76 | |
| dc.identifier.uri | https://digitalarchive.library.bogazici.edu.tr/handle/123456789/13605 | |
| dc.publisher | Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016. | |
| dc.subject.lcsh | Optical fibers. | |
| dc.title | An interferometric vibration sensor based on a four - core optical fiber |
Files
Original bundle
1 - 1 of 1