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The effect of amplitude (power) variations on beam combining efficiency for phased arrays

Author(s)
Fan, Tso Yee
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
In coherent beam combining (phased arrays), control of the relative amplitudes (powers) of array elements is needed to maximize the beam combining efficiency. Here, expressions are derived for the efficiency in approaches that use interferometric combiners such as diffractive optical elements or fiber couplers. The beam combining efficiency is relatively insensitive to small power errors. In the case of dropped elements, the efficiency is equal to the fraction of operating elements. The beam combining efficiency is equivalent to the Strehl ratio for a tiled aperture.
Date issued
2009-04
URI
http://hdl.handle.net/1721.1/52452
Department
Lincoln Laboratory
Journal
IEEE Journal of Selected Topics in Quantam Electronics
Publisher
Institute of Electrical and Electronics Engineers
Citation
Fan, T.Y. “The Effect of Amplitude (Power) Variations on Beam Combining Efficiency for Phased Arrays.” Selected Topics in Quantum Electronics, IEEE Journal of 15.2 (2009): 291-293. © 2009 Institute of Electrical and Electronics Engineers
Version: Final published version
Other identifiers
INSPEC Accession Number: 10558202
ISSN
1077-260X
Keywords
phased arrays, optical arrays, laser arrays

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