Tunable Acousto-Optic Filter for the 450–900 and 900–1700 nm Spectral Range

Batshev, V. I.; Мачихин, А. С.; Козлов, А. Б.; Боритко, С. В.; Sharikova, M. O.; Karandin, A. V.; Пожар, В. Э.; Lomonov, V. A.

doi:10.1134/s1064226920070025

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…The geometry of this AOC is optimized for minimization of the chromatic image drift in the confocal optical scheme. It provides good spectral and spatial resolution and may be used in a wide spectral range [ 20 ]. Residual angular dispersion is 0.4°.…”

Section: Methodsmentioning

confidence: 99%

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

et al. 2021

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Spectral image filtration by means of acousto-optical tunable filters (AOTFs) has multiple applications. For its implementation, a few different optical schemes are in use. They differ in image quality, number of coupling components, dimensions and alignment complexity. To choose the optical system of AOTF-based spectral imager properly, many factors have to be considered. Though various schemes of acousto-optic (AO) filtration have been tested and discussed, their comparative analysis has not been reported up to now. In this study, we assembled the four most popular schemes (confocal, collimating, tandem and double-path) using the same AO cells and experimentally compared their main features. Depending on the application, each scheme may be the basis of compact cost-effective spectral imaging devices.

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Section: Methodsmentioning

confidence: 99%

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

et al. 2021

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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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“…Since the discovery of light diffraction caused by ultrasound wave [1], researchers have made an in-depth exploration of acousto-optic interaction [2][3][4][5]. They used an acoustooptic effect to modulate the frequency, intensity and propagation direction of optical signal, and then design an acousto-optic tunable filter (AOTF) [6][7][8], acousto-optic deflector (AOD) [9][10][11], acousto-optic modulator (AOM) [12][13][14] and other optical devices, which are widely used in optical communication, laser control, spectrum detection and other fields [15][16][17]. Among them, an AOM uses diffraction to realize the frequency shift of the diffracted light relative to the incident light.…”

Section: Introductionmentioning

confidence: 99%

Double-Frequency-Shift Acousto-Optic Modulator with Controllable Pulse Pair Frequency Difference

et al. 2021

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A scheme for controlling the frequency difference of output pulse pair with double frequency shift loops is proposed. The frequency shift system includes two loop elements of 20 and 200 MHz. The first one carries out a single selective positive frequency shift of 1–20 MHz, and the second one can satisfy a single fixed positive frequency shift of 200 MHz. The reverse cascade technology of two acousto-optic crystals is introduced to solve the limitation of the small frequency shift of crystal size. A multichannel synchronization signal completes the time domain control of each acousto-optic modulator. Finally, the frequency shift difference of the output pulse pair ranges of 0–2 GHz, and the frequency shift accuracy is 5 MHz.

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Tunable Acousto-Optic Filter for the 450–900 and 900–1700 nm Spectral Range

Cited by 12 publications

References 11 publications

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

Spectral Imaging Experiments with Various Optical Schemes Based on the Same AOTF

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

Double-Frequency-Shift Acousto-Optic Modulator with Controllable Pulse Pair Frequency Difference

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