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http://cio.repositorioinstitucional.mx/jspui/handle/1002/431| OPTICAL FIBER DEVICES BASED ON MODAL INTERFERENCE FOR SENSING APPLICATIONS | |
| Guillermo Salceda-Delgado | |
| Alejandro Martinez_Rios | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| TAPERED OPTICAL FIBER, MULTI-CORE FIBER, COMB-FILTER, BENDING SENSOR, MODAL INTERFERENCE, COUPLING COEFFICIENT, SEVEN-CORE FIBER | |
| "In this work, the modal interference effect in optical fibers was used with the aim of sensing applications. By means of tapering single mode fibers and utilizing a special seven-core fiber, modal interference was generated, and the modifications induced by external perturbations, such as bending, were evaluated. The principal objective of this thesis was the measurement of physical parameters, particularly bending, using optical fiber modal devices. For this modal interference to be controlled, it was made in a single mode fiber. In order to obtain modal interference in a single mode fiber, it is necessary to induce perturbations that cause modal coupling for the generation of more than one mode propagating trough the single mode fiber device, then, by physically perturbing this device, it is possible to change the interference properties which can be monitored to find the magnitude of the physical parameter that causes this interference change. For the modal coupling in optical fibers there are several kinds of perturbations capable to induce coupling, such as long period gratings, Bragg Gratings, optical fiber tapers, and so on. Everything that causes a breaking of the translational invariance on the longitudinal uniformity of the fiber can be considered as a coupling device. In this case, one way to make the coupling is by using a tapered optical fiber. These tapered optical fibers break the longitudinal invariance of the optical fiber by a diameter change. The optical fiber tapers presented in this work consist of a diameter decrement, then a section with a constant diameter (called waist), then there is an increment of diameter until the original diameter of the untapered fiber is reached." | |
| 2015-06 | |
| Tesis de doctorado | |
| Inglés | |
| León, Guanajuato | |
| Salceda-Delgado, (2015). "Optical fiber devices based on modal interference for sensing applications". Tesis de Doctorado en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 96 pp. | |
| FIBRAS ÓPTICAS | |
| Aparece en las colecciones: | DOCTORADO EN CIENCIAS (ÓPTICA) |
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| 16469.pdf | 2.58 MB | Adobe PDF | Visualizar/Abrir |