We present an optical time-delay line based on photorefractive beam coupling in a rotating crystal. The delay line can be tapped continuously or at selected positions. We demonstrate a 64-channel device with a BaTiO3 crystal rotating at 1.5 rpm, which gives approximately a 167-Hz bandwidth and 0.5 s of time delay for each channel.
© 1993 Optical Society of America
Original Manuscript: June 29, 1992
Published: January 15, 1993
Gan Zhou and Dana Z. Anderson, "Photorefractive delay line for the visualization and processing of time-dependent signals," Opt. Lett. 18, 167-169 (1993)