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The performance of wideband carbon dioxide laser waveforms is severely reduced by absorption and anomalous dispersion caused by atmospheric carbon dioxide. This paper deals with modeling and analyzing these atmospheric distortion effects.
The latest version of the Air Force Geophysics Laboratory (AFGL) FASCODE program is used to perform some CO2 laser line atmospheric transmittance calculations. Data from these transmittance calculations are then used to develop a two-way path model of the amplitude and phase distortion for a given transmit/receive path. The matched filter response to wideband signals is used to illustrate the net effect of this atmospheric absorption and dispersion. Results are presented which include the effect of relative motion (Doppler shift) between the transmitter and the receiver.
© 1987 Optical Society of America
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