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Characterization and alignment of acousto-optic devices using digital tailored RF waveforms

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Abstract

Acousto-optic (AO) devices are used in a variety of light control and processing applications in different environments, including laboratory conditions and the field environment, as well as on air- and space-borne platforms. Accurate alignment and calibration of AO deflectors and tunable filters is crucial for correct operation and to achieve specified performances of those devices. We describe a simple routine to test and align AO devices with a programmable RF waveform generator. Using specially tailored RF waveforms as test signals enables single-shot measurement of an AO device’s diffraction efficiency as a function of the applied RF signal frequency and amplitude. MATLAB code is available to implement the testing procedure and application demonstrations for an AO deflector and two types of AO tunable filters.

© 2022 Optica Publishing Group

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Supplementary Material (4)

NameDescription
Code 1       MATLAB tool for characterization and alignment of acousto-optic devices using digital tailored RF waveforms
Visualization 1       Noncollinear acousto-optic tunable filter (AOTF) response to linear frequency sweep and amplitude ramp at continuously tuned Bragg angle. The video represents a series of oscilloscope screenshots made with 0.1° Bragg angle step. Full angle range is f
Visualization 2       Quasicollinear acousto-optic tunable filter (AOTF) response to linear frequency sweep and amplitude ramp continuously tuned Bragg angle. The video represents a series of oscilloscope screenshots made with 0.01° Bragg angle step. Full angle range is f
Visualization 3       Acousto-optic deflector (AOD) response to linear frequency sweep and amplitude ramp continuously tuned Bragg angle. The video represents a series of oscilloscope screenshots made with 0.01° Bragg angle step. Full angle range is from -0.60° to +0.60°.

Data availability

Data underlying the results presented in this paper are available as code in Ref. [19].

19. K. Yushkov and G. Slinkov, “MATLAB tool for characterization and alignment of acousto-optic devices using digital tailored RF waveforms,” Version 1, Code Ocean, published 15 April 2022, https://codeocean.com/capsule/4067727/.

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Equations (11)

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