Title page for ETD etd-12052002-154013


Type of Document Master's Thesis
Author Chen, Qiao
Author's Email Address qichen1@vt.edu
URN etd-12052002-154013
Title ESA based fiber optical humidity sensor
Degree Master of Engineering
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Claus, Richard O. Committee Chair
Jacobs, Ira Committee Member
Spillman, William B. Jr. Committee Member
Keywords
  • humidity fiber optic ESA
Date of Defense 2002-11-21
Availability unrestricted
Abstract
Several techniques for measuring humidity are presented. The goal of the study is to use

the electrostatic self-assembled monolayer synthesis process to fabricate a Fabry-Parot

Cavity based optical fiber humidity sensor. The sensing scheme bases on the refractive

index change with relative humidity of the film applied to the end of optical fiber. That is,

the change in reflected optical power indicates certain humidity. To achieve this, some

chemicals induce on specific coating materials were applied at the end of optical fiber. In

this thesis, experimental results are given to prove that the humidity sensor has high

sensitive and fast response time. Furthermore, we investigate the potential for the use of

human breathing monitoring and air flow rate detection. Results from preliminary tests of

each are given.

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