Acoustic Field Models and Diffraction Efficiency in Acousto-Optic Tunable Filters Based on Mercurous Bromide Crystals

Huijie Zhao; Shujing Sun; Shijie Wang; Qi Guo

doi:10.3788/AOS240633

Acta Optica Sinica, Volume. 44, Issue 16, 1623001(2024)

Acoustic Field Models and Diffraction Efficiency in Acousto-Optic Tunable Filters Based on Mercurous Bromide Crystals

Huijie Zhao^1,3,4, Shujing Sun^2,4, Shijie Wang^2,4, and Qi Guo^2,3,4、*

Author Affiliations

¹Institute of Artificial Intelligence, Beihang University, Beijing 100191, China

²School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China

³Aerospace Optical-Microwave Integrated Precision Intelligent Sensing, Key Laboratory of Ministry of Industry and Information Technology, Beihang University, Beijing 100191, China

⁴Qingdao Research Institute of Beihang University, Qingdao 266104, Shandong , China

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Figures & Tables(10)

Fig. 1. AOTF acousto-optic interaction diagram

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Fig. 2. Wave vector distribution diagrams in anisotropic crystals. (a) Layout of acoustic vector and optical vector; (b) acoustic vector layout under isofrequency curve

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Fig. 3. Three-dimensional phase velocity surfaces of Hg₂Br₂ crystals. (a) $V_{Q P}$ ; (b) $V_{Q S 1}$ ; (c) $V_{Q S 2}$

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Fig. 4. High-frequency acoustic field model data diagrams. (a) Acousto-optic interaction surface acoustic field of TeO₂; (b) transmissive surface acoustic field of TeO₂; (c) acousto-optic interaction surface acoustic field of Hg₂Br₂; (d) transmissive surface acoustic field of Hg₂Br₂

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Fig. 5. Low-frequency acoustic field model data graphs. (a) Acousto-optic interaction surface acoustic intensity of TeO₂; (b) acousto-optic interaction surface acoustic phase of TeO₂; (c) acousto-optic interaction surface acoustic intensity of Hg₂Br₂; (d) acousto-optic interaction surface acoustic phase of Hg₂Br₂

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Fig. 6. Acoustic field visualization test optical path

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$Actual measurement results of TeO2 AOTF acousto-optic diffraction. (a) Without light transmission window; (b) with light transmission window; (c) schematic of the light transmission window position$

Fig. 7. Actual measurement results of TeO₂ AOTF acousto-optic diffraction. (a) Without light transmission window; (b) with light transmission window; (c) schematic of the light transmission window position

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$Trends in the diffraction efficiency of transmitted light plane. (a) Diffraction efficiency in the direction of sound transmission with a window; (b) diffraction efficiency in the direction of the transducer with a window; (c) diffraction efficiency in the direction of sound transmission without a window; (d) diffraction efficiency in the direction of the transducer without a window$

Fig. 8. Trends in the diffraction efficiency of transmitted light plane. (a) Diffraction efficiency in the direction of sound transmission with a window; (b) diffraction efficiency in the direction of the transducer with a window; (c) diffraction efficiency in the direction of sound transmission without a window; (d) diffraction efficiency in the direction of the transducer without a window

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Table 1. Material parameters for tellurium dioxide and mercurous bromide crystals
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Table 1. Material parameters for tellurium dioxide and mercurous bromide crystals
Crystal
Density
$ρ$ /(kg·m^-3)
Elastic stiffness modulus /(10¹⁰ N·m^-2)
C₁₁ C₁₂ C₁₃ C₃₃ C₄₄ C₆₆
Tellurium dioxide (TeO₂) 5990 5.57 5.12 2.18 10.58 2.65 6.59
Mercurous bromide (Hg₂Br₂) 7190 1.62 1.50 1.82 8.89 7.45 1.12

Table 2. Deviation comparison of simulation values and measured values of diffraction efficiency
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Table 2. Deviation comparison of simulation values and measured values of diffraction efficiency
Transparent surface Diffraction efficiency /%
Sound propagation direction
Transducer
direction
With window 2.41 2.12
Without window 1.12 1.03

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Huijie Zhao, Shujing Sun, Shijie Wang, Qi Guo. Acoustic Field Models and Diffraction Efficiency in Acousto-Optic Tunable Filters Based on Mercurous Bromide Crystals[J]. Acta Optica Sinica, 2024, 44(16): 1623001

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Paper Information

Category: Optical Devices

Received: Feb. 9, 2024

Accepted: Apr. 29, 2024

Published Online: Aug. 5, 2024

The Author Email: Guo Qi (qguo@buaa.edu.cn)

DOI:10.3788/AOS240633

CSTR:32393.14.AOS240633

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Material parameters for tellurium dioxide and mercurous bromide crystals

Table 1. Material parameters for tellurium dioxide and mercurous bromide crystals

Table 2. Deviation comparison of simulation values and measured values of diffraction efficiency

Table 2. Deviation comparison of simulation values and measured values of diffraction efficiency