Time-Integrating Optical Correlator

Fred B. Rotz

doi:10.1117/12.958112

30 January 1980 Time-Integrating Optical Correlator

Fred B. Rotz

Proceedings Volume 0202, Active Optical Devices; (1980) https://doi.org/10.1117/12.958112
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A time-integrating optical correlator was designed and built to detect the presence and relative delay of a digital signal buried in both synchronous and random noise. The system accepts a digital reference signal at data rates from 1 Mb/s to 100 Mb/s and cross correlates this with an analog signal of up to 200 MHz bandwidth. The output correlation covers a relative delay of 1 microsecond with a resolution of 3 ns. The correlation is performed in an optical subsystem employing two acousto-optic Bragg cells. Integration time can be varied from 2 ms to several minutes. Preprocessing of the incoming data, combined with digital postprocessing of the output from the optical subsystem results in correlation gains of over 50 dB. Greater data rates, delay range and bandwidths can be readily achieved

Citation Download Citation

Fred B. Rotz "Time-Integrating Optical Correlator", Proc. SPIE 0202, Active Optical Devices, (30 January 1980); https://doi.org/10.1117/12.958112

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