ERA

Download the full-sized PDF of Spectroscopy of methane using a vertical cavity surface-emitting laser system with emphasis on development for portable applicationsDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3N137

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Spectroscopy of methane using a vertical cavity surface-emitting laser system with emphasis on development for portable applications Open Access

Descriptions

Other title
Subject/Keyword
VCSEL
second harmonic detection
spectroscopy
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Dzikowski, Matthew
Supervisor and department
Tulip, John (Electrical and Computer Engineering)
Examining committee member and department
Jaeger, Wolfgang (Chemistry)
Tulip, John (ECE)
Tsui, Ying (ECE)
Department
Electrical and Computer Engineering
Specialization

Date accepted
2009-10-01T21:39:29Z
Graduation date
2009-11
Degree
Master of Science
Degree level
Master's
Abstract
There is a great deal of interest in monitoring atmospheric greenhouse gases such as methane. Although distributed feedback edge-emitting lasers are often used for atmospheric detection, the development of the vertical cavity surface-emitting laser (VCSEL) has allowed for an alternative source. The VCSEL exhibits several advantages over distributed feedback (DFB), edge-emitting lasers, especially in terms of power requirements and tuning capabilities. A second harmonic spectroscopy system based on a VCSEL laser is presented. Battery operation of the driver, temperature control and receiver is achieved. The system is used to detect methane gas in open path situations, as well as in gas cylinders. Temperature and current scanning are compared as methods for laser wavelength modulation. Mathematical methods for characterizing and filtering absorption signals are investigated. The receiver system is also used with a DFB laser to compare performance with the VCSEL. A software receiver using LabVIEW is implemented, and its performance is compared with the hardware designs. A minimum detectable limit of 1.4 ppm•m of methane for the hardware receiver is reported.
Language
English
DOI
doi:10.7939/R3N137
Rights
License granted by Matthew Dzikowski (matthewd@ualberta.ca) on 2009-09-30T22:17:45Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2014-04-30T22:45:58.295+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 4916449
Last modified: 2015:10:12 16:34:38-06:00
Filename: Dzikowski_Matthew_Fall 2009.pdf
Original checksum: 6e6a9bbf3299f3c91f3ac85629dd1582
Well formed: false
Valid: false
Status message: Invalid page tree node offset=4336431
Status message: Unexpected error in findFonts java.lang.ClassCastException: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject cannot be cast to edu.harvard.hul.ois.jhove.module.pdf.PdfDictionary offset=2633
Status message: Outlines contain recursive references.
File title: University of Alberta
Page count: 75
Activity of users you follow
User Activity Date