Abstract

An interferometric scanning acoustooptic (AO) spectrum analyzer is described. The instantaneous detector array is replaced by an AO Bragg cell driven by a short rf pulse and a single fast photodetector, and the diffracted beam is mixed with a local oscillator. The temporal modulation of the heterodyne signal gives the spectrum of the input signal with linear characteristics. Using this architecture, a dynamic range of 70 dB can be achieved with a large time–bandwidth product (1000) and high speed (50 μs/spectrum).

© 1991 Optical Society of America

Fast scanning acoustooptic spectrum analyzer with high dynamic range

Laszlo Jakab and Peter Richter
Appl. Opt. 29(5) 654-657 (1990)

Interferometric spectrum analyzer

A. Vander Lugt
Appl. Opt. 20(16) 2770-2779 (1981)

Acoustooptic spectrum analyzer: detection of pulsed signals

Jim P. Y. Lee and J. S. Wight
Appl. Opt. 25(2) 193-198 (1986)

Acoustooptic snapshot PROM: a real-time optical-signal spectrum analyzer

Robert A. Sprague
Appl. Opt. 17(17) 2762-2767 (1978)

Temporal frequencies of short and evolving pulses in interferometric spectrum analyzers

P. H. Wisseman and A. VanderLugt
Appl. Opt. 28(18) 3800-3809 (1989)