Minimization of nonlinear acousto-optic Bragg cell intermodulation products

Author

Pape, Dennis R.

Author_Institution

Photonic Syst. Inc., Melbourne, FL, USA

fYear

1989

fDate

3-6 Oct 1989

Firstpage

509

Abstract

The acoustooptic Bragg cell intermodulation products (IMPs) arising from multiple optical diffraction (dynamic IMPs) fundamentally limit Bragg-cell dynamic range. The IMPs arising from acoustic harmonic waves generated by the nonlinear elastic response of the Bragg cell crystalline lattice (elastic IMPs) may further limit dynamic range in Bragg cells operating at high frequencies or long time apertures. It is shown that the elastic IMPs can be minimized by increasing the Bragg-cell transducer length. The length can be increased without the attendant bandwidth loss using a phased array transducer. It is shown experimentally that this device is limited in dynamic range by the dynamic IMPs and thus exhibits the maximum spurious-free dynamic range possible

Keywords

acousto-optical devices; spectral analysers; surface acoustic wave devices; Bragg-cell dynamic range; acoustic harmonic waves; acoustooptic Bragg cell intermodulation products; bandwidth loss; crystalline lattice; multiple optical diffraction; nonlinear elastic response; phased array transducer; Acoustic waves; Apertures; Crystallization; Dynamic range; Frequency; Lattices; Nonlinear acoustics; Optical diffraction; Optical harmonic generation; Phased arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1989. Proceedings., IEEE 1989

Conference_Location

Montreal, Que.

Type

conf

DOI

10.1109/ULTSYM.1989.67037

Filename

67037