Acousto-optic spectrum analysis of RF pulsed signals having Bartlett and Blackman envelope waveforms

The application of the acousto optic spectral analysis technique to RF pulsed signals having either Bartlett or Blackman envelope waveforms is investigated based on a generalized formulation which yields their spectra as they evolves through the Bragg cell. It is shown that, even with uniform light beam, power spectrum with side lobe supression as high as 58 dB can be attained. The detected temporal responses from a real-time photodetector array are analyzed as a function of the pulse envelope waveforms and the relative photodetector to spectra centroid location. The appearance of flattop and multiple humps are discussed.