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1 May 1991 Experimental implementation of an optical multiple-aperture antenna for space communications
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Proceedings Volume 1522, Optical Space Communication II; (1991)
Event: Munich '91 (Lasers '91), 1991, Munich, Germany
An optical multiple-aperture antenna whose subantenna fields are phased should permit nonmechanical steering of the outgoing laser beam in analogy to the microwave regime. Corresponding theoretical analysis showed promising results. To our knowledge, however, little experimental evidence of optical phasing exists, prompting a beam steering experiment having 'proof-of-concept' character. Our design foresees a small optical antenna array consisting of three subapertures fed by a diode-pumped Nd:YAG ring laser via single-mode fibers. A measurement and control unit generates the necessary phase adjustment signals applied to piezoelectric fiber stretchers acting as phasing actuators. To this end, a 'pilot-beam' concept was developed. The individual subantenna beams are phased with respect to the pilot beam, which defines the direction of the antenna axis.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wolfgang M. Neubert, Walter R. Leeb, and Arpad L. Scholtz "Experimental implementation of an optical multiple-aperture antenna for space communications", Proc. SPIE 1522, Optical Space Communication II, (1 May 1991); doi: 10.1117/12.46082;

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