Optical Components, Detectors, and Displays

Transmission function of the collinear acousto-optical filter controlled by acoustic waves of the finite amplitude

[+] Author Affiliations
Alexandre S. Shcherbakov

National Institute for Astrophysics, Optics & Electronics (INAOE), Puebla 72000, Mexico

Adán Omar Arellanes

National Institute for Astrophysics, Optics & Electronics (INAOE), Puebla 72000, Mexico

Sergey A. Nemov

St. Petersburg State Polytechnic University, Polytechnicheskaya Street 29, St. Petersburg 195251, Russian Federation

Opt. Eng. 52(6), 064001 (Jun 10, 2013). doi:10.1117/1.OE.52.6.064001
History: Received February 11, 2013; Revised April 14, 2013; Accepted May 7, 2013
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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 (CaMoO4) 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.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Alexandre S. Shcherbakov ; Adán Omar Arellanes and Sergey A. Nemov
"Transmission function of the collinear acousto-optical filter controlled by acoustic waves of the finite amplitude", Opt. Eng. 52(6), 064001 (Jun 10, 2013). ; http://dx.doi.org/10.1117/1.OE.52.6.064001


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