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Optical Engineering

Transmission function of the collinear acousto-optical filter controlled by acoustic waves of the finite amplitude
Author(s): Alexandre S. Shcherbakov; Adan O. Arellanes; Sergey A. Nemov
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Paper Abstract

An opportunity to exploit specific mechanisms of the acousto-optic nonlinearity to regulate performances of the collinear acousto-optical filter, realizing the sequential spectrum analysis of optical signals, is considered. This possibility is theoretically analyzed and experimentally confirmed with an advanced filter based on calcium molybdate (CaMoO 4 ) single-crystal with a 15-μs time-aperture. It is able to operate over red and near-infrared light at relatively low radio-wave frequencies providing almost lossless regime for controlling acoustic waves of the finite amplitude. Under certain conditions, the transmission function of electronically tunable filter exhibits a marked dependence on the applied acoustic power density, and as a result, one can significantly squeeze the transmission function, i.e., improve the spectral resolution of this filter at the cost of decreasing the efficiency of the device partially. The identified and observed non-linear effect makes possible varying the performance data of similar advanced collinear acousto-optical filter governed by external signals of the finite amplitude.

Paper Details

Date Published: 10 June 2013
PDF: 10 pages
Opt. Eng. 52(6) 064001 doi: 10.1117/1.OE.52.6.064001
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Alexandre S. Shcherbakov, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Adan O. Arellanes, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Sergey A. Nemov, St. Petersburg State Polytechnical Univ. (Russian Federation)

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