Laser atmospheric phase and amplitude measurement

Till Wolfgang Liepmann

doi:10.1117/12.18352

1 May 1990 Laser atmospheric phase and amplitude measurement

Till Wolfgang Liepmann

Proceedings Volume 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere; (1990) https://doi.org/10.1117/12.18352
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

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.

Citation Download Citation

Till Wolfgang Liepmann "Laser atmospheric phase and amplitude measurement", Proc. SPIE 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere, (1 May 1990); https://doi.org/10.1117/12.18352

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