Acousto-Optic Spectrum Analyzer: Temporal Response and Detection of Pulsed Signals

摘要

This report describes the temporal response of an acoustooptic spectrum analyzer to pulse modulated continuous wave signals. The detected waveforms from the outputs of a real time photodetector array are analyzed as a function of pulse width, weighting function parameters, and relative photodetector to spectral centroid location. The input pulse envelope is modified in the forms of signal duration stretching, the appearance of a flattop, multiple humps, and longer rise and fall times. Various schemes are discussed on the determination of the pulse width from the detected waveform.