Potentials of acousto-optical spectrum analysis on a basis of a novel algorithm of the collinear wave heterodyning in a large-aperture KRS-5 crystalline cell

Alexandre S. Shcherbakov; Jewgenij Maximov; Alexej M. Bliznetsov; Karla J. Sanchez Perez

doi:10.1117/1.3549892

1 March 2011 Potentials of acousto-optical spectrum analysis on a basis of a novel algorithm of the collinear wave heterodyning in a large-aperture KRS-5 crystalline cell

Alexandre S. Shcherbakov, Jewgenij Maximov, Alexej M. Bliznetsov, Karla J. Sanchez Perez

Author Affiliations +

Optical Engineering, Vol. 50, Issue 3, 034002 (March 2011). https://doi.org/10.1117/1.3549892

Abstract

The technique under proposal for a precise spectrum analysis within an algorithm of the collinear wave heterodyning implies a two-stage integrated processing, namely, the wave heterodyning of a signal in a square-law nonlinear medium and then the optical processing in the same solid state cell. The technical advantage of this approach lies in providing a direct multichannel parallel processing of ultra-high-frequency radio-wave signals with essentially improved frequency resolution. This technique imposes specific requirements on the cell's material. We focus our attention on the solid solutions of thallium chalcogenides and take the TlBr-TlI (thallium bromine-thallium iodine) solution, which forms KRS-5 cubic-symmetry crystals with the mass-ratio 58% of TlBr to 42% of TlI. Analysis shows that the acousto-optical cell made of a KRS-5 crystal oriented along the [111]-axis and the corresponding longitudinal elastic mode for producing the dynamic diffractive grating can be exploited. With the acoustic velocity of about 1.92 × 10⁵ cm/s and attenuation of ∼10 dB/(cm GHz²), a similar cell is capable of providing an optical aperture of ∼5.0 cm and one of the highest figures of acousto-optical merit in solid states in the visible range. Such a cell is rather desirable for the application to direct 5000-channel parallel spectrum analysis with an improved up to 10−⁵ relative frequency resolution.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Alexandre S. Shcherbakov, Jewgenij Maximov, Alexej M. Bliznetsov, and Karla J. Sanchez Perez "Potentials of acousto-optical spectrum analysis on a basis of a novel algorithm of the collinear wave heterodyning in a large-aperture KRS-5 crystalline cell," Optical Engineering 50(3), 034002 (1 March 2011). https://doi.org/10.1117/1.3549892

Published: 1 March 2011

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