Record Details

Advanced Multifunctional Bulk Optical & Fiber Bragg Grating Sensing Techniques

Electronic Theses of Indian Institute of Science

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Field Value
 
Title Advanced Multifunctional Bulk Optical & Fiber Bragg Grating Sensing Techniques
 
Creator Shivananju, B N
 
Subject Optical Shadow Casting
Fiber Bragg Grating
Fiber Bragg Grating Sensors
Etched Fiber Bragg Grating
Metal Coated Fiber Bragg Grating
Hydrogel Coated Fiber Bragg Grating
Chalcogenide Coated Fiber Bragg Grating
Surface Molecular Adsorption
Fiber Optic Sensors
Fiber Bragg Gratings - Photonics
Carbon Nanotube Coated Fiber Bragg Grating
Instrumentation
 
Description In this thesis work, a systematic quantitative study has been undertaken, on the performance of etched fiber Bragg Grating (FBG) sensors in the investigation of surface molecular adsorption in real-time; it is shown that the limit of detection (LOD) of FBGs etched below 2 microns diameter, is better compared to prominent optical label-free molecular sensing techniques such as Surface Plasmon Resonance (SPR).
Novel fiber optic sensors based on FBG and etched FBG with various nano materials (polyelectrolytes, carbon nanotubes, hydrogel, metals and chalcogenides) coated on the surface of the core or cladding, have been proposed for sensing multi parameters such as pH, protein, humidity, gas, strain, temperature, and light etc. Besides being reproducible and repeatable, the proposed methods are fast, compact, and highly sensitive.
A novel optical instrument has also been developed to measure angular deviation, binocular deviation and refractive index of glass slabs, and liquids, based on a shadow casting technique. This method uses the deviation in the geometrical shadow cast by a periodic dot pattern trans-illuminated by a distorted light beam from the transparent test specimen relative to a reference pattern.
 
Contributor Asokan, S
Varma, Manoj M
 
Date 2017-05-04T07:46:48Z
2017-05-04T07:46:48Z
2017-05-04
2013-07
 
Type Thesis
 
Identifier http://hdl.handle.net/2005/2611
http://etd.ncsi.iisc.ernet.in/abstracts/3408/G26310-Abs.pdf
 
Language en_US
 
Relation G26310