The time-reversal (TR) protocol we implement in an erbium-doped YSO crystal is based on photon echoes but avoids the storage of the signal to be processed. Unlike other approaches implying digitizing or highly dispersive optical fibers, the proposed scheme reaches the μs range and potentially offers high bandwidth, both required for RADAR applications. In this Letter, we demonstrate faithful reversal of arbitrary pulse sequences with 6 μs duration and 10 MHz bandwidth. To the best of our knowledge, this is the first demonstration of TR via linear filtering in a programmable material.
© 2013 Optical Society of America
Original Manuscript: November 12, 2012
Revised Manuscript: January 22, 2013
Manuscript Accepted: January 23, 2013
Published: February 22, 2013
H. Linget, L. Morvan, J.-L. Le Gouët, and A. Louchet-Chauvet, "Time reversal of optically carried radiofrequency signals in the microsecond range," Opt. Lett. 38, 643-645 (2013)