Abstract
This paper investigates the effect of group delay ripple on optical
beam-formers using chirped fiber grating. Such optical beam-formers were
promised to have many advantages over their electrical beam-forming
counter-parts. However, mathematical analysis and simulation results have
shown that the group delay ripple causes many drawbacks such as the
limitation in operation frequency, RF signal bandwidth, and the number of
elements. The most advantageous feature of optical beam-formers, which is
squint-free operation for wideband, high frequency signals, is severely
affected when chirped grating is used.
© 2009 IEEE
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