Abstract
We demonstrate compression of ultrawideband (UWB) microwave arbitrary
waveforms via phase-only matched filtering implemented in a programmable hyperfine
resolution optical pulse shaper. We synthesize spread-time UWB electrical
waveforms and utilize programmable microwave photonic phase filters to impose
the opposite of a waveform's spectral phase on its spectrum. This enables
us to compress an UWB microwave waveform to its corresponding bandwidth-limited
pulse duration via phase filtering. As an example, we present compression
of a linear frequency-modulated electrical waveform with {>}15 GHz frequency content with almost 200% fractional
bandwidth with ~733 ps
temporal window to a 40-ps duration pulse with more than 14-dB gain in peak
power. Our technique is programmable and we believe it is applicable to a
wide range of arbitrary spectral phase modulated UWB radio frequency (RF)
waveforms.
© 2008 IEEE
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