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Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

2019

University of Nebraska - Lincoln

Theses, Dissertations, and Student Research from Electrical & Computer Engineering

Middle infrared

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Full-Text Articles in Engineering

Ultrashort Cross-Correlation In The Middle Infrared: A Novel Approach To Standoff Detection, William Conner Thomas Apr 2019

Ultrashort Cross-Correlation In The Middle Infrared: A Novel Approach To Standoff Detection, William Conner Thomas

Theses, Dissertations, and Student Research from Electrical & Computer Engineering

Lasers are a common tool in standoff detection because of their small divergence, large amount of power, and multiple wavelengths available for optical interaction. Optical signatures of targets can be composed of but are not limited to absorption, fluorescence, backscatter, polarization manipulation, and plasma spectra. This work was an investigation of a new signature phenomenon: Dispersion of middle infrared ultrashort laser pulses through gas and vapor phase molecules. Vibrational and rovibrational absorption lines of molecular species affect the spectral phase and spectral amplitude of ultrashort light pulses leading an inititally gaussian temporal profile to become distorted. This dissertation is an ...