Abstract

To correct complex optical system aberrations a number of phase conjugation techniques are widely developed, for the present time. The phase conjugation, used for imaging telescope systems, is found to improve of a system resolution and to compensate for stress- and heat -induced aperture aberrations during an observation of remote objects. The main PC techniques are based on four wave mixing of radiation in a nonlinear medium or on self-conjugation of observed signal. However, every PC method operates under limiting conditions. For example, self-conjugation technique is limited in a signal threshold level that restricts imaging telescope system sensibility. In the case of FWM technique use, the input radiation coming from a remote object must be coherent to a laser radiation pumping the PC mirror.

© 1996 IEEE