Acousto-Optics Overview

Acousto-Optic Deflectors

An Isomet acousto optic deflector (AOD) can be used for scanning a laser beam in one or two axes. By changing the frequency of the input RF signal, the position of the first-order diffracted spot generated from the AOD can be altered. The available Isomet driver allows full control of the spot position without any moving parts.

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Acousto-Optic Modulators

An Isomet acousto-optic modulator (AOM) can be used for modulating the amplitude of a laser beam. An AOM operates on the principle that when it is aligned at the Bragg angle that corresponds to the laser wavelength and RF frequency being applied, the modulator diffracts a portion of the beam passing through it from the zero order into the first order. Using the available Isomet AOM driver, the first order modulation can be either digital (on-off) or analogue (video). For analogue modulation, the intensity of the first order light is controlled by the amplitude of the input RF signal.

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Acousto-Optic Q-switches

An Isomet acousto-optic Q-switch (AOQ) is typically used intracavity in cw-pumped diode or lamp pumped solid state lasers. When the Q-Switch RF signal is turned on and off, the AOS produces a pulsed output at frequencies between 0.5 and >50KHz. We offer a range of standard Q-Switches, but also work with customers to build custom Q-Switches and companion RF drivers. As a vertically-integrated company, Isomet have full process control of the crystal growth, fabrication, vacuum bonding and anti-reflection coating; this allows for rapid fabrication of custom devices.

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Acousto-Optic Tunable Filters

An Isomet acousto-optic tunable filter (AOTF) offers continuous tunability, fast access time and narrow spectral bandwidths making them ideal for spectroscopy and remote sensing applications. Precise wavelength selection is achieved by applying the appropriate RF drive frequency.

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