Understanding Acousto-Optic Modulators (AOMs)
Understanding Acousto-Optic Modulators (AOMs)
Blog Article
An Acousto-Optic Modulator (AOM) is a device that uses sound waves to control light. By applying an RF (radio frequency) signal to a piezoelectric transducer, the AOM generates acoustic waves in a crystal (like TeO₂). These waves create a periodic refractive index variation, acting as a diffraction grating for incoming laser light.
Key features of AOMs include:
Fast light modulation (up to MHz/GHz speeds)
Precise control of intensity, frequency, and direction of light
Low insertion loss and high diffraction efficiency
AOMs are widely used in laser systems, optical communications, and spectroscopy for applications like Q-switching, frequency shifting, and beam deflection. Their ability to rapidly and accurately manipulate light makes them essential in advanced photonics.
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