Acousto-optic deflector

An acousto-optic deflector (AOD) is a device that uses the interaction between

In the operation of an acousto-optic deflector the power driving the acoustic transducer is kept on, at a constant level, while the acoustic frequency is varied to deflect the beam to different angular positions. The acousto-optic deflector makes use of the acoustic frequency dependent diffraction angle, where a change in the angle ${\displaystyle \Delta \theta _{d}}$ as a function of the change in frequency ${\displaystyle \Delta f}$ given as,[1]

${\displaystyle (12)\ \Delta \theta _{d}={\frac {\lambda }{\nu }}\Delta f}$

where ${\displaystyle \lambda }$ is the optical wavelength and ${\displaystyle \nu }$ is the velocity of the acoustic wave.

Impact

AOM technology has made

• Acousto-optic modulator
• Acousto-optics
• Acousto-optical spectrometer
• Nonlinear optics
• Sonoluminescence

References

Paschotta, Rüdiger. "Acousto-optic Deflectors". Archived from the original on 2023-09-08. Retrieved 2023-09-08.

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