Cavity ring fiber chemical sensors
In recent years, optical fiber chemical sensors are paid increasing attentions due to their electrical passivity, remote sensing potentials and miniaturization feasibility, relying on the specific properties of the optical fibers. Highly sensitive spectroscopic techniques are highly demande...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2010
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| Online Access: | https://hdl.handle.net/10356/41730 |
| _version_ | 1826118569401778176 |
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| author | Ni, Na |
| author2 | Chan Chi Chiu |
| author_facet | Chan Chi Chiu Ni, Na |
| author_sort | Ni, Na |
| collection | NTU |
| description | In recent years, optical fiber chemical sensors are paid increasing attentions due to
their electrical passivity, remote sensing potentials and miniaturization feasibility,
relying on the specific properties of the optical fibers. Highly sensitive spectroscopic
techniques are highly demanded for enhancing the sensitivities of the optical fiber
chemical sensors. This thesis mainly reports optical fiber cavity ring-down (CRD) and
cavity ring-up (CRU) based-sensors for chemical sensing and other applications.
The thesis begins with a comprehensive survey on the existing types and
spectroscopic techniques for optical fiber chemical sensors. Following that, direct
absorption spectroscopy, which is the most commonly used spectroscopic technique,
is studied. The direct absorption spectroscopy-based optical fiber chemical sensors
are analyzed· based on a practical setup. Aiming at reducing the effects of the main
noises in this kind of sensor, a digital finite impulse response (FIR) filter is designed
to improve this chemical sensor's sensitivity. The simulation and experimental results
have shown that the detection accuracy is enhanced by this digital signal processing
(DSP) technique. |
| first_indexed | 2024-10-01T04:45:36Z |
| format | Thesis |
| id | ntu-10356/41730 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:45:36Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/417302023-03-03T16:01:39Z Cavity ring fiber chemical sensors Ni, Na Chan Chi Chiu School of Chemical and Biomedical Engineering DRNTU::Engineering::Chemical engineering::Biotechnology In recent years, optical fiber chemical sensors are paid increasing attentions due to their electrical passivity, remote sensing potentials and miniaturization feasibility, relying on the specific properties of the optical fibers. Highly sensitive spectroscopic techniques are highly demanded for enhancing the sensitivities of the optical fiber chemical sensors. This thesis mainly reports optical fiber cavity ring-down (CRD) and cavity ring-up (CRU) based-sensors for chemical sensing and other applications. The thesis begins with a comprehensive survey on the existing types and spectroscopic techniques for optical fiber chemical sensors. Following that, direct absorption spectroscopy, which is the most commonly used spectroscopic technique, is studied. The direct absorption spectroscopy-based optical fiber chemical sensors are analyzed· based on a practical setup. Aiming at reducing the effects of the main noises in this kind of sensor, a digital finite impulse response (FIR) filter is designed to improve this chemical sensor's sensitivity. The simulation and experimental results have shown that the detection accuracy is enhanced by this digital signal processing (DSP) technique. DOCTOR OF PHILOSOPHY (SCBE) 2010-08-05T08:16:35Z 2010-08-05T08:16:35Z 2008 2008 Thesis Ni, N. (2008). Cavity ring fiber chemical sensors. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/41730 10.32657/10356/41730 en 202 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Chemical engineering::Biotechnology Ni, Na Cavity ring fiber chemical sensors |
| title | Cavity ring fiber chemical sensors |
| title_full | Cavity ring fiber chemical sensors |
| title_fullStr | Cavity ring fiber chemical sensors |
| title_full_unstemmed | Cavity ring fiber chemical sensors |
| title_short | Cavity ring fiber chemical sensors |
| title_sort | cavity ring fiber chemical sensors |
| topic | DRNTU::Engineering::Chemical engineering::Biotechnology |
| url | https://hdl.handle.net/10356/41730 |
| work_keys_str_mv | AT nina cavityringfiberchemicalsensors |