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.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	ESAhumiditysensor.pdf	1.38 Mb	00:06:24	00:03:17	00:02:52	00:01:26	00:00:07