Masters Theses


Mujahid Abdul

Keywords and Phrases



"Anthropogenic greenhouse gas emission has become an eminent problem today especially CO₂ gas emission is of major importance. Statistics show that CO₂ concentration is consistently increasing in atmosphere every year. Having cognizance of this problem, better CO₂ absorbents, ionic liquids, has been suggested through this thesis. To prove Ionic liquid's efficiency, a unique sensor was developed by a sophisticated fabrication using Femto-second (fs) laser. Sensor is built to work as an extrinsic Fabry-Perot Interferometer (EFPI) to sense CO₂. EFPI sensor consists of a glass tube fused between two single mode fibers, and a miniature hole is fabricated in the tube using fs-laser to admit ionic liquids as medium. EFPI works on the principle of the changes encountered by the light reflected back from the flat surfaces of the fiber at the two walls of the tube thus resulting in a wavelength shift in the original spectrum. This interference will strongly be affected by change in any optical property of the medium. As a medium of EFPI, Ionic liquid is exposed to CO₂ through the fabricated hole and resultant shift in wavelength of the spectrum is referred to as a change in refractive index of Ionic liquid due to CO₂ absorption. Dynamic response of this sensor is recorded using optical spectrum analyzer (OSA) and the data is processed using MATLAB. Spectrum is closely monitored to evaluate the accurate change in the refractive index of Ionic liquid. Experimental results clearly proved the change in refractive index of Ionic liquid due to absorption of CO₂"--Abstract, page iii.


Xiao, Hai, Dr.

Committee Member(s)

Ferdowsi, Mehdi
Zawodniok, Maciej Jan, 1975-


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


United States. Department of Energy


Missouri University of Science and Technology

Publication Date

Summer 2013


ix, 30 pages

Note about bibliography

Includes bibliographical references.


© 2013 Mujahid Abdul, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Fabry-Perot interferometers -- Design and construction
Carbon monoxide detectors -- Design and construction
Carbon monoxide -- Measurement -- Instruments
Total internal reflection (Optics)
Fused salts

Thesis Number

T 10346

Electronic OCLC #