Acousto-optic spectrometer for speckle imaging

Yushkov, Konstantin B.; Anikin, Sergey P.; Gurov, Vasily V.; Kolesnikov, A. I.; Molchanov, V. N.; Татарников, А. М.; Potanin, S.; Есипов, В. Ф.

doi:10.1117/12.2311620

Cited by 4 publications

(1 citation statement)

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“…Chang introduced the Parallel Tangent Principle (PTP) to achieve a wide angular aperture [10]. The theoretical formula for the non-collinear AOTF proposed by Chang laid the foundation for AOTF and system design, which is applicable across various spectrums ranging from visible [11] to long-wave infrared [12], from conventional acousto-optic (AO) crystals [13] to new types of AO crystals [14], and from single-channel [15] to multi-channel types [16]. In addition, quasi-collinear devices are also a hot topic of recent research, with the advantage of achieving ultra-high spectral resolution and diffraction efficiency through very long acousto-optic interaction lengths [17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Phase Mismatch for Mercurous Bromide-Based Non-Collinear AOTF Design in Spectral Imaging Applications

Zhao,

Cheng,

Guo

et al. 2024

Materials

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The spectral and spatial characteristics of Acousto-Optic Tunable Filters (AOTFs), such as a tuning curve, spectral resolution, angular aperture, and diffraction efficiency, are determined by the device’s acousto-optic crystal configuration and piezoelectric transducer. For high-throughput spectral imaging applications, it is essential to enlarge the spectral bandwidth and angular aperture during the design phase of AOTFs. Thus, phase mismatch due to incident angle or wavelength was studied analytically using phase diagrams in this paper. Additionally, a performance parameter analysis model was established based on the use of mercurous bromide crystals for large angular aperture AOTF device design, and the impact of crystal and transducer design parameters on the spectral bandwidth and angular aperture was evaluated. This also experimentally validates the diffraction capability of AOTFs made from mercurous bromide crystal, which possess a broad spectral transmission ability ranging from visible to long-wave infrared.

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