An acousto-optic real-time ’’two-crystal’’ correlator
- 15 January 1978
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 32 (2) , 85-87
- https://doi.org/10.1063/1.89945
Abstract
A real‐time correlator has been developed that utilizes successive acousto‐optic interactions in two adjacent piezoelectric crystals (lithium niobate, LiNbO3, and bismuth germanium oxide, BGO) having surface‐acoustic‐wave (SAW) propagation velocities that differ by almost a factor of 2. Complex waveforms, such as FM chirps and Barker codes, have been correlated successfully. A large time‐bandwidth product (∼3000) was obtained, and a 40‐dB dynamic range was shown to be feasible. The use of this two‐crystal device to obtain either pulse expansion or time inversion of a signal also was demonstrated.Keywords
This publication has 3 references indexed in Scilit:
- A new acoustophotorefractive effect in lithium niobateApplied Physics Letters, 1977
- High−performance acousto−optic guided−light−beam device using two tilting surface acoustic wavesApplied Physics Letters, 1975
- Surface state memory in surface acoustoelectric correlatorApplied Physics Letters, 1974