Double signal phase conjugation with a Cat conjugator

The phase conjugate reflection of double signals, induced by the self-pumpe d phase conjugation, is demonstrated in a 16 degrees cut Cu-doped potassium sodium strontium barium niobate (KNSBN) photorefractive crystal. The phase conjugate reflectivities of signals were measured versus the pump-signal b eam ratio. A comparison was made between the signal's reflectivity with and without the presence of the other signal beam. The multi-region four-wave mixing model within the same crystal has been employed to explain the geome try performance and the experimental results. (C) 2001 Elsevier Science Ltd . All rights reserved.