Design And Performance Of Wide Band Bragg Cells

T. F. Willats; S. C. Gratze

doi:10.1117/12.935906

13 December 1983 Design And Performance Of Wide Band Bragg Cells

T. F. Willats, S. C. Gratze

Proceedings Volume 0415, Coherent Infrared Radar Systems and Applications II; (1983) https://doi.org/10.1117/12.935906
Event: 1983 Technical Symposium East, 1983, Arlington, United States

Abstract

The design of bulk acoustic wave Bragg cells for radar warning and other signal processing applications is discussed, comparing lithium niobate, paratellurite and gallium phosphide. Acousto-optic interaction efficiency, acoustic loss, transducer design and acoustic matching are considered together with a selection of requirements for device bandwidth, resolution and efficiency. The bandwidth and efficiency figures for anisotropic and isotropic interactions are compared and the available dynamic range assessed. The mechanical and electrical design of the Bragg cell housing and feeds will be presented together with the methods used to fabricate the cells and monitor the production process. Testing of the device performance will be described and results for a number of cells presented showing reliable achievement of dynamic ranges exceeding 50 dB from cells with better than 1% per watt diffraction efficiency and 1 GHz bandwidth.

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T. F. Willats and S. C. Gratze "Design And Performance Of Wide Band Bragg Cells", Proc. SPIE 0415, Coherent Infrared Radar Systems and Applications II, (13 December 1983); https://doi.org/10.1117/12.935906

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KEYWORDS

Acoustics

Transducers

Bragg cells

Diffraction

Lithium niobate

Polishing

Signal attenuation

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