The effect of amplitude (power) variations on beam combining efficiency for phased arrays
Name
Fan-2009-The Effect of Amplit.pdf
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126.16 KB
Format
Adobe PDF
Checksum (MD5)
544a5ae6eb355680aa5713f0027bd207
Author(s)
Fan, Tso Yee
Date Issued
April 2009
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
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.
Subjects
phased arrays
optical arrays
laser arrays
MIT Department
Lincoln Laboratory
Terms of Use
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.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1109/JSTQE.2008.2010232
