We have observed spatial-image storage and phase conjugation, using a backward-stimulated echo in a solid sample. The image storage and the delayed phase conjugation were observed to last for at least 15 sec, which is 3 × 105 times longer than the radiative lifetime of the excited state. The backward-stimulated echo produced on the 3H4–3P0 transition of Pr3+:LaF3 is found to be a phase-conjugated spatial reproduction of the first excitation pulse. The image storage time depends strongly on the sample temperature.
© 1987 Optical Society of America
Original Manuscript: September 22, 1986
Manuscript Accepted: December 4, 1986
Published: March 1, 1987
M. K. Kim and R. Kachru, "Long-term image storage and phase conjugation by a backward-stimulated echo in Pr3+:LaF3," J. Opt. Soc. Am. B 4, 305-308 (1987)