Design of an interferometric guided-wave correlator for radar applications

Mario Nicola Armenise; Vittorio M. N. Passaro; Tiziana Conese-Bond; Anna Maria Matteo

doi:10.1117/12.156586

15 September 1993 Design of an interferometric guided-wave correlator for radar applications

Mario Nicola Armenise, Vittorio M. N. Passaro, Tiziana Conese-Bond, Anna Maria Matteo

Proceedings Volume 1953, Photonics for Space Environments; (1993) https://doi.org/10.1117/12.156586
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

In this paper, we present the theoretical investigation, design, and simulation of a new LiNbO₃ guided-wave optical correlator suitable for real-time SAR applications. It is based on a complex interferometric structure, involving four aperiodic phase-reversal traveling wave modulators. The electrode structure is designed in order to reproduce the product signal between the received and reference voltages, which is then time-integrated by a suitable photodetector. The filtered signal outgoing from the detector is proportional to the final correlation function, which can be electronically registered and multiplexed on a two- dimensional matrix by sum-and-shift procedure. Thus, the processor performs the correlation function between the reference signal and the received signal when they are applied to the laser diode and to the electrodes as driving voltage, respectively. Comparisons between two different LiNbO₃ waveguide fabrication techniques, i.e., proton exchange and titanium indiffusion, have been carried out in terms of circuit performances in order to reconstruct the SAR images.

Citation Download Citation

Mario Nicola Armenise, Vittorio M. N. Passaro, Tiziana Conese-Bond, and Anna Maria Matteo "Design of an interferometric guided-wave correlator for radar applications", Proc. SPIE 1953, Photonics for Space Environments, (15 September 1993); https://doi.org/10.1117/12.156586

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KEYWORDS

Electrodes

Modulators

Waveguides

Synthetic aperture radar

Interferometers

Radar

Phase shifts

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