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Proceedings Paper

Low- and high-frequency ocean acoustic phase conjugation experiments
Author(s): Hee Chun Song; Geoffrey Edelmann; Seong-Il Kim; W. S. Hodgkiss; William A. Kuperman; Tuncay Akal
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Paper Abstract

We have performed a series of acoustic phase conjugation (PC0 experiments in shallow water. A time reversal mirror (TRM) was implemented for center frequencies of 450 Hz and 3500 Hz. Very sharp focal regions out to ranges of 30 km were obtained. Analysis, including attenuation effects, indicates that the diffraction limit on the size of the focal region was reached. This has implications for defining the maximum resolution of a matched field processor because the latter is simply a hybrid computational implementation of PC. The fact that a TRM both spatially and temporally refocuses energy with the aid of a probe suggests that ocean self-equalization with respect to communication processing is possible. Indeed, a preliminary demonstration of this self-equalization process was experimentally achieved.

Paper Details

Date Published: 16 November 2000
PDF: 5 pages
Proc. SPIE 4123, Image Reconstruction from Incomplete Data, (16 November 2000); doi: 10.1117/12.409260
Show Author Affiliations
Hee Chun Song, Scripps Institution of Oceanography (United States)
Geoffrey Edelmann, Scripps Institution of Oceanography (United States)
Seong-Il Kim, Scripps Institution of Oceanography (South Korea)
W. S. Hodgkiss, Scripps Institution of Oceanography (United States)
William A. Kuperman, Scripps Institution of Oceanography (United States)
Tuncay Akal, SACLANT Undersea Research Ctr. (United States)

Published in SPIE Proceedings Vol. 4123:
Image Reconstruction from Incomplete Data
Michael A. Fiddy; Rick P. Millane, Editor(s)

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