Photonic liquid crystal fiber (PLCF) sensing

Photonic Crystal Fibers (PCFs) are characterized by the pattern arrangement of micrometer-size air-holes along the length of the fiber. This micro-structured waveguide is capable of guiding light by a modified form of total internal reflection (TIR) and by photonic bandgap (PBG) effect. The existenc...

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Main Author: Chan, Yen Mei.
Other Authors: Chan Chi Chiu
Format: Final Year Project
Language:English
Published: 2010
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Online Access:http://hdl.handle.net/10356/39707
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-397072023-03-03T15:33:30Z Photonic liquid crystal fiber (PLCF) sensing Chan, Yen Mei. Chan Chi Chiu School of Chemical and Biomedical Engineering DRNTU::Engineering::Chemical engineering::Biotechnology Photonic Crystal Fibers (PCFs) are characterized by the pattern arrangement of micrometer-size air-holes along the length of the fiber. This micro-structured waveguide is capable of guiding light by a modified form of total internal reflection (TIR) and by photonic bandgap (PBG) effect. The existence of the air-holes in the cladding region has opened up opportunities to introduce new materials into the fiber. Thus, this allows interactions between light and the hole-material, whilst maintaining the microstructure of the fiber. In this paper, we have infiltrated a solid-core PCF with E7 nematic liquid crystals to develop a Photonic Liquid Crystal Fiber (PLCF). With liquid crystals in the microholes, the fiber functionality and sensing can be increased as it operates on the PBG effect, instead of the conventional TIR mechanism. The first part of this research focuses on the infiltration of liquid crystals into the PCF to form the PLCF. Thereafter, it looks into the fusion-splicing process necessary to connect the PLCF with a single-mode fiber (SMF; patch-cord) so that experiments can be conducted more effectively. This forms the basic set-up to investigate the effect of mechanically induced long period gratings (LPGs), temperature changes and external electric field on the PLCF. As far as possible, experimental results in these areas are discussed succinctly, and deductions are verified using control set-ups involving an empty solid-core PCF. Lastly, an extended investigation is also included to analyze mechanically induced tilted LPGs on the PLCF, empty PCF and solid-core PCFs infiltrated with lower refractive index oils. Bachelor of Engineering (Chemical and Biomolecular Engineering) 2010-06-03T03:51:11Z 2010-06-03T03:51:11Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/39707 en Nanyang Technological University 109 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Chemical engineering::Biotechnology
spellingShingle DRNTU::Engineering::Chemical engineering::Biotechnology
Chan, Yen Mei.
Photonic liquid crystal fiber (PLCF) sensing
description Photonic Crystal Fibers (PCFs) are characterized by the pattern arrangement of micrometer-size air-holes along the length of the fiber. This micro-structured waveguide is capable of guiding light by a modified form of total internal reflection (TIR) and by photonic bandgap (PBG) effect. The existence of the air-holes in the cladding region has opened up opportunities to introduce new materials into the fiber. Thus, this allows interactions between light and the hole-material, whilst maintaining the microstructure of the fiber. In this paper, we have infiltrated a solid-core PCF with E7 nematic liquid crystals to develop a Photonic Liquid Crystal Fiber (PLCF). With liquid crystals in the microholes, the fiber functionality and sensing can be increased as it operates on the PBG effect, instead of the conventional TIR mechanism. The first part of this research focuses on the infiltration of liquid crystals into the PCF to form the PLCF. Thereafter, it looks into the fusion-splicing process necessary to connect the PLCF with a single-mode fiber (SMF; patch-cord) so that experiments can be conducted more effectively. This forms the basic set-up to investigate the effect of mechanically induced long period gratings (LPGs), temperature changes and external electric field on the PLCF. As far as possible, experimental results in these areas are discussed succinctly, and deductions are verified using control set-ups involving an empty solid-core PCF. Lastly, an extended investigation is also included to analyze mechanically induced tilted LPGs on the PLCF, empty PCF and solid-core PCFs infiltrated with lower refractive index oils.
author2 Chan Chi Chiu
author_facet Chan Chi Chiu
Chan, Yen Mei.
format Final Year Project
author Chan, Yen Mei.
author_sort Chan, Yen Mei.
title Photonic liquid crystal fiber (PLCF) sensing
title_short Photonic liquid crystal fiber (PLCF) sensing
title_full Photonic liquid crystal fiber (PLCF) sensing
title_fullStr Photonic liquid crystal fiber (PLCF) sensing
title_full_unstemmed Photonic liquid crystal fiber (PLCF) sensing
title_sort photonic liquid crystal fiber (plcf) sensing
publishDate 2010
url http://hdl.handle.net/10356/39707
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