Title
Coherent Optical Array Receivers For The Mitigation Of Atmospheric Turbulence And Speckle Effects
Abbreviated Journal Title
Appl. Optics
Keywords
Coherent Optical Array Receivers; Heterodyne Arrays; Space Diversity; Receivers; Coherent Optical Communications; Atmospheric Turbulence; Compensation; Electro-Optic Phase-Locked Loop; Heterodyne Detector Array; Lidar; Optics
Abstract
A description is given of the design, operation, and test over a 2-km path (roundtrip) of a continuous wave, coherent laser array receiver that uses two independent aperture-receivers whose intermediate frequencies are electro-optically co-phased in real time and then added as a proposed way to overcome effective aperture limitations imposed by atmospheric turbulence and to mitigate signal fading associated with atmospheric turbulence and speckle effects. The experiment resulted in a mean carrier-to-noise ratio increase of 1.8, which is within 1% of the theoretical predictions, when the two signals were phase locked, versus no increase without phase locking. Further, the carrier fading strength, or normalized carrier-to-noise ratio variance, was reduced by a factor of 0.53, which is within 2% of the theoretical prediction. The bandwidth of the electro-optic phase-locked loop was measured to be of the order of 600 Hz, which is adequate to compensate for atmospheric refractive turbulence fluctuations. (C) 1996 Optical Society of America
Journal Title
Applied Optics
Volume
35
Issue/Number
30
Publication Date
1-21-1995
Document Type
Article
Language
English
First Page
5999
Last Page
6009
WOS Identifier
ISSN
0003-6935
Recommended Citation
"Coherent Optical Array Receivers For The Mitigation Of Atmospheric Turbulence And Speckle Effects" (1995). Faculty Bibliography 1990s. 776.
https://stars.library.ucf.edu/facultybib1990/776
Comments
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