Physics – Optics
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.308..110g&link_type=abstract
Nature (ISSN 0028-0836), vol. 308, March 8, 1984, p. 110, 111.
Physics
Optics
1
Geometrical Optics, Mirrors, Phase Conjugation, Wave Reflection, Aberration, Atmospheric Optics, Brillouin Effect, High Power Lasers, Holography, Incident Radiation, Refractivity, Windows
Scientific paper
The principles and potential applications of phase-conjugate mirrors (PCM) are explored. Light incident on a PCM is reflected as a complex conjugate of the incident wave, i.e., the phase is reversed. Additionally, a diverging beam is reflected as a converging beam back to its source. Phase conjugate reflections have been produced by light-induced heating, saturable stimulated emission and absorption, molecular orientation, electrostriction, surface deformation, charge migration, and photorefraction. The reflections have been obtained from solids, liquids, gases, plasmas, aerosols, and liquid crystals. Conjugate images have been generated with lasers to form holograms, where the laser wavelength determined the size of the image. The PCM effect has been applied to correcting aberrations due to imperfect optics such as windows, lenses, high power laser amplifiers, and the earth's atmosphere.
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