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Conjugate-wave-front generation by degenerate four-wave mixing is used to produce images with a resolution better than 500 lines/mm with 514.5-nm light. © 1980, Optical Society of America.
S.H. Perlmutter, M. Levenson, et al.
Physical Review Letters
R.M. Shelby, M. Levenson
Optics Communications
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IQEC 1984