Heterodyne laser radar array receivers for the mitigation of target-induced speckle

Philip Gatt; Wilson P. Perez; Dean Anthony Heimmermann; C. Martin Stickley

doi:10.1117/12.157101

15 October 1993 Heterodyne laser radar array receivers for the mitigation of target-induced speckle

Philip Gatt, Wilson P. Perez, Dean Anthony Heimmermann, C. Martin Stickley

Author Affiliations +

Proceedings Volume 1936, Applied Laser Radar Technology; (1993) https://doi.org/10.1117/12.157101
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

We investigated a space diversity optical heterodyne array receiver for optimal coherent detection of finite transverse coherence length fields. In such an array receiver, each of the independent IF signals are appropriately phase-shifted and summed to generate a single IF signal with improved statistical qualities. In this paper we show that the advantages offered by a coherent array are both an increased average carrier-to-noise ratio and a reduction in carrier fading. We also show that the equal gain diversity reception technique performs almost as well as the maximal ratio technique with significantly less hardware complexity. Finally, we present the experimental results from a two element, one micron, laboratory breadboard ladar system.

Citation Download Citation

Philip Gatt, Wilson P. Perez, Dean Anthony Heimmermann, and C. Martin Stickley "Heterodyne laser radar array receivers for the mitigation of target-induced speckle", Proc. SPIE 1936, Applied Laser Radar Technology, (15 October 1993); https://doi.org/10.1117/12.157101

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