Fabrication and characterization of probes for near-field spectroscopy
In this project, the light propagating characteristics in tapered fibers are investigated via experiments and simulations. The tapered fiber is fabricated based on the heating and pulling method, where the propagation of light waves through the optical fiber is detected by the photo-detector and the...
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| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2009
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| Online Access: | http://hdl.handle.net/10356/17877 |
| _version_ | 1811693893605916672 |
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| author | Ng, Wei Yin Jenny |
| author2 | Soh Yeng Chai |
| author_facet | Soh Yeng Chai Ng, Wei Yin Jenny |
| author_sort | Ng, Wei Yin Jenny |
| collection | NTU |
| description | In this project, the light propagating characteristics in tapered fibers are investigated via experiments and simulations. The tapered fiber is fabricated based on the heating and pulling method, where the propagation of light waves through the optical fiber is detected by the photo-detector and the light intensity is monitored throughout the pulling process. The simulation is based on the finite-difference time-domain (FDTD) technique, which is used to simulate the optical fiber at each stage of the pulling process. The structure of the tapered fiber used in the simulations is equivalent to the actual tapered fiber dimension. The throughput at different taper diameters, taper lengths and fiber lengths are investigated. The experimental study is compared with the simulation results to quantify the throughput characteristics of the tapered fiber. The throughput is found to decrease with decreasing taper diameter and the throughput is independent of the fiber length. A tapered fiber with a sufficiently small taper diameter will experience extreme sensitivity, where large fluctuations will result when the fiber is on the verge of breaking. |
| first_indexed | 2024-10-01T06:58:55Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/17877 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:58:55Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/178772023-07-07T16:36:48Z Fabrication and characterization of probes for near-field spectroscopy Ng, Wei Yin Jenny Soh Yeng Chai Zhang Ying School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics In this project, the light propagating characteristics in tapered fibers are investigated via experiments and simulations. The tapered fiber is fabricated based on the heating and pulling method, where the propagation of light waves through the optical fiber is detected by the photo-detector and the light intensity is monitored throughout the pulling process. The simulation is based on the finite-difference time-domain (FDTD) technique, which is used to simulate the optical fiber at each stage of the pulling process. The structure of the tapered fiber used in the simulations is equivalent to the actual tapered fiber dimension. The throughput at different taper diameters, taper lengths and fiber lengths are investigated. The experimental study is compared with the simulation results to quantify the throughput characteristics of the tapered fiber. The throughput is found to decrease with decreasing taper diameter and the throughput is independent of the fiber length. A tapered fiber with a sufficiently small taper diameter will experience extreme sensitivity, where large fluctuations will result when the fiber is on the verge of breaking. Bachelor of Engineering 2009-06-17T05:37:28Z 2009-06-17T05:37:28Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/17877 en Nanyang Technological University 99 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Ng, Wei Yin Jenny Fabrication and characterization of probes for near-field spectroscopy |
| title | Fabrication and characterization of probes for near-field spectroscopy |
| title_full | Fabrication and characterization of probes for near-field spectroscopy |
| title_fullStr | Fabrication and characterization of probes for near-field spectroscopy |
| title_full_unstemmed | Fabrication and characterization of probes for near-field spectroscopy |
| title_short | Fabrication and characterization of probes for near-field spectroscopy |
| title_sort | fabrication and characterization of probes for near field spectroscopy |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics |
| url | http://hdl.handle.net/10356/17877 |
| work_keys_str_mv | AT ngweiyinjenny fabricationandcharacterizationofprobesfornearfieldspectroscopy |