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| Identifier |
000399454 |
| Title |
Magneto-rheological devices in microstructured optical fibers |
| Alternative Title |
Μαγνητορεολογικές διατάξεις σε μικροδομημένες οπτικές ίνες |
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Author
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Ταγκούδη, Ειρήνη Β.
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Thesis advisor
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Χαραλαμπίδης, Δημήτρης
Πισσαδάκης, Σταύρος
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| Abstract |
During the last twenty years there has been a massive progress in the field of optical fiber technology targeting sensing, switching, actuating and imaging applications. The evolution from conventional optical fibers to a different type, that of microstructured optical fibers (MOFs), opened up new paths into the development of multi-functional optical fiber devices. The structure of the MOFs, with a number of air capillaries running along the length of the fiber, provides optofluidic capabilities by merging together photonics and fluidics.
The purpose of the present thesis is the experimental investigation and development of three devices based on Microstructured Optical Fibers infiltrated with ferrofluids. The use of magnetic field stimulus for tuning the spectral transmission properties of different types of MOFs utilizing either infiltrated or outcladding ferrofluids was examined.
The first device constructed combines the technology of multicapillary MOFs with the functionalities of the ferrofluids. The device was spectrally characterized and tuned under magnetic field fluctuations. The results led to an extremely sensitive magnetic field sensor. Moreover, the possibility to use this in-fiber ferrofluidic device for endoscopic imaging applications was also investigated.
The second device demonstrated in the current thesis was based on a non-adiabatically tapered PENTA MOF. The interference between the fundamental and higher order modes in tapered region of MOF was observed by strong spectral modulation. We proved that the modal interference patterns of a ferrofluid infiltrated tapered MOF can be manipulated utilizing magnetic field stimulus leading to a photonic device with high sensitivity in magnetic field changes.
The last device developed was a power routing device that combines the technology of tapered, multicore MOFs with ferrofluidic overlayers over the tapered region. Power coupling between the central core and the adjacent cores of the tapered multicore MOF was demonstrated, utilizing magnetic field stimulus into a ferrofluidic outcladding surrounding the optical fibre taper, leading to a sensitive power exchanging device.
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| Language |
English |
| Subject |
Ferrofluids |
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Magnetic field |
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Magnetic field sensors |
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Magneto-induced effects |
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Magnetorheological devices |
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Photonic devices |
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Tapered fibers |
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Αισθητήρες μαγνητικού πεδίου |
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Θερμικά εφελκυσμένες οπτικές ίνες |
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Μαγνητικό πεδίο |
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Μαγνητο-επαγόμενα φαινόμενα |
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Μαγνητορευστά |
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Φωτονικές διατάξεις |
| Issue date |
2016-03-18 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
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Type of Work--Post-graduate theses
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| Views |
533 |
Magneto-rheological devices in microstructured optical fibers
