Abstract
The scheme of phase conjugation (PC) in four-wave mixing with feedback (FWMF) using an amplifier in the feedback loop is a laser controlled by an external optical signal. Note that in this scheme the generation is, generally, developed simultaneously in two directions and is withdrawn through a nonlinear medium as the useful reflected wave Er counter to the signal and the parasitic wave Ep copropagating with the signal. The energy of the parasitic wave Ep often proves to be higher than the energy of the reflected wave Er.1,2 Thus, the problem of providing the unidirectional propagation of the conjugate wave is urgent.
© 1994 IEEE
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