Skip to Main Content
Frequently Asked Questions
Submit an ETD
Global Search Box
Need Help?
Keyword Search
Participating Institutions
Advanced Search
School Logo
Files
File List
Ziruo Cui_Thesis_Final_version (2)final format approved LW 4-15-14.pdf (5.6 MB)
ETD Abstract Container
Abstract Header
Wet Etching Optical Fibers to Sub-micron Diameters for Sensing Application
Author Info
Cui, Ziruo
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1397801129
Abstract Details
Year and Degree
2014, Master of Science (M.S.), University of Dayton, Electro-Optics.
Abstract
In this thesis we explore a novel technique to fabricate sub-micron diameter tapered fibers for sensor applications. Physically the light propagating in a tapered fiber has an evanescent field that extends into the medium surrounding the fiber containing an analyte. A sub-micron diameter taper can expels most the electromagnetic energy into the medium thus increasing the sensitivity of the measurement. The tapering process we develop enables us to have precise control over the final diameter of the taped fiber's waist. The tapered single mode fiber sensors (TSMFs) are fabricated using a two-step procedure. First, a single mode fiber is tapered to about 10 microns using Vytran Glass Processing System. Second, we etch the TSMFs with 6:1 buffered HF solution to a controlled sub-micron size. During the etching process we monitor the fiber's progress by measuring the transmittance characteristics. The in situ measurements are made by connecting a laser at one fiber end and using a photodetector to measure the transmittance at the other end. We find a temporal modulation of the transmittance during the etching process, which is due to the changes in the propagation constants of the fiber modes. The details of this device are described and its optical properties are examined in this thesis. To better understand the transmission characteristics recorded in the experiment we develop a simulation of the optical power propagating through the tapered fiber to calculate the transmitted power. We apply a Beam Propagation Method (BPM) to simulate the light wave passing through the tapered fiber sensor. We numerically analyze the transmittance characteristics of the beam oscillating inside the TSMFs. Our simulations are applied to validate the experimental results.
Committee
Joseph Haus, Ph.D. (Committee Chair)
Peter Powers, Ph.D. (Advisor)
Partha Banerjee, Ph.D. (Committee Member)
Pages
89 p.
Subject Headings
Optics
Keywords
Tapered single-mode fiber sensor
;
Wet etching
;
Sensitivity
;
Beam Propagation Method
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Cui, Z. (2014).
Wet Etching Optical Fibers to Sub-micron Diameters for Sensing Application
[Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1397801129
APA Style (7th edition)
Cui, Ziruo.
Wet Etching Optical Fibers to Sub-micron Diameters for Sensing Application.
2014. University of Dayton, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1397801129.
MLA Style (8th edition)
Cui, Ziruo. "Wet Etching Optical Fibers to Sub-micron Diameters for Sensing Application." Master's thesis, University of Dayton, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1397801129
Chicago Manual of Style (17th edition)
Abstract Footer
Document number:
dayton1397801129
Download Count:
5,254
Copyright Info
© 2014, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.