Wavefront Correction and Scattering with Phase-Conjugate Waves
The majority of researches in the field of phase-conjugate optics have up to now mainly centered around the problem of developing efficient techniques for generating an optical wavefield that in some region of space is the complex conjugate of a given wavefield. The main stimulus for this research has come from the general belief that when a wave is transmitted by a non-absorbing medium, say the inhomogeneous atmosphere, the distortion imparted on the wave by the medium can be eliminated by conjugating it and transmitting it back through the same medium (Fig. 1). Many experiments have demonstrated the possibility of such a “healing effect” of conjugation. However, until very recently little attention has been paid to elucidating this phenomenon theoretically.
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