Investigation of sensor applications based on highly germania-doped fibers
The dissertation is mainly to study fiber-optic sensors based on highly Germania-doped fibers. Fabrications, propagation mode analyses and experiment results of the fiber sensors with two different structures are presented. Principles of excitation of higher order propagation mode by coupling sin...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/75994 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The dissertation is mainly to study fiber-optic sensors based on highly
Germania-doped fibers. Fabrications, propagation mode analyses and experiment
results of the fiber sensors with two different structures are presented.
Principles of excitation of higher order propagation mode by coupling single mode
fibers to multi-mode fibers are reviewed in this dissertation. Simulations are also
performed to confirm the propagation modes that are transmitted in the fiber sensors.
Finally, experiments are conducted to test the temperature and the strain sensitivity.
The relationship between these two parameters is also analyzed.
The sensor shows a fairly high-temperature sensitivity at 94pm/°C. It can be applied
in a simultaneous measurement of temperature and strain with the help of the
measurement matrices derived in this dissertation. |
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