ADDITIONAL PHASE-CHANGE BETWEEN SATURABLE ABSORPTION AND HOLOGRAPHIC COMPONENTS IN PHASE-CONJUGATE INTERFEROMETRY

Measured are the unwanted additional phase change between two componen ts of phase-conjugate (PC) signals, the saturable absorption and holog raphic components, simultaneously generated in a real-time PC interfer ometry with an erythrosin B-doped polyvinyl alcohol film used as a PC mirror. For the pump and probe intensities of 1 W/cm2 and 0.3 W/cm2 an d optical density of 1.8, the unwanted additional phase change was les s than about pi/4 within 5 min for the hologram-recording times of 15 s, 30 s and 60 s, and less than about pi/8 for the hologram-recording time of 120 s. The temperature rise of the irradiated dye-doped film w as mainly responsible for the unwanted additional phase change.