Physics – Optics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1221..351l&link_type=abstract
IN: Propagation of high-energy laser beams through the earth's atmosphere; Proceedings of the Meeting, Los Angeles, CA, Jan. 15-
Physics
Optics
Atmospheric Optics, Atmospheric Turbulence, Laser Beams, Light Transmission, Optical Measurement, Pulsed Lasers, Charge Coupled Devices, Fourier Transformation, Interferometry, Software Tools
Scientific paper
An experimental system is presented for measuring a pulsed laser beam's atmospherically-induced phase and amplitude distortions, using a fixed receiver and mobile transmitter. The noninterferometric measurement method operates over ground paths up to 2 km, and has as its primary advantage over MTF and scintillometric methods the gathering of explicit phase information. System operation involves the transmission of 10-20 nsec laser pulses, at either 532 or 1064 nm, from the 200-m aperture of the transmitter to the 200-mm aperture of the receiver. The pupil and focal planes are related by the two-dimensional Fourier transform; by iteratively analyzing the irradiance distributions in these planes, the computer can ascertain the phase and amplitude of the entering wavefront.
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