Accession Number : ADA181396

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

Descriptive Note : Technical note,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Lee,Jim P-Y.

Report Date : DEC 1986

Pagination or Media Count : 30

Abstract : This report describes the temporal response of an acousto optic spectrum analyzer to pulse modulated cw signals. The detected waveforms from the outputs of a real-time photodector array are analyzed as a function of pulse width, weighting function parameters, and relative photodector 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. Keywords: Acoustooptic spectrum analyzer; Pulsewidth determination; Acoustooptic receiver; Bragg cells; Continous wave signals; Canada.

Descriptors :   *ACOUSTOOPTICS, *SPECTRUM ANALYZERS, *LIGHT MODULATORS, CANADA, ENVELOPE(SPACE), INPUT, PULSES, CENTER OF GRAVITY, SPECTRA, SIGNAL PROCESSING, WIDTH, SIGNALS, WAVES, CONTINUOUS WAVES, PULSE MODULATION

Subject Categories : Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE