The acousto-optics is a field of physics that studies the interaction between sound and light. This interaction effect based on the diffraction of light by periodic modulation of the refractive index of a transparent optical material, which is generated by acoustic wave propagation in that environment.
What is the acousto-optic effect?
What is acousto-optic devices?
Acousto-optics is a versatile technology that allows users to precisely and rapidly control the wavelength, amplitude and propagation direction of a laser beam.
What does an acousto-optic modulator do?
An acousto-optic modulator (AOM) is a device which can be used for controlling the power of a laser beam with an electrical drive signal.
How does an acousto-optic deflector work?
Acousto-optic deflectors are devices which can be used to deflect a laser beam in one direction by a variable angle, controlled by the frequency of an electrical signal. Essentially, such a device is an acousto-optic modulator which is operated with an electrical drive signal of constant power but a variable frequency.
Who gave the correct explanation for acousto-optic effect?
This model was developed by Phariseau (1956) for diffraction including only one diffraction order. In general, acousto-optic effects are based on the change of the refractive index of a medium due to the presence of sound waves in that medium.
What is acousto-optic tunable filter?
Acousto-optic tunable filters (AOTFs) are solid state wavelength tunable optical filters. … Interactions of photons with these perturbations allow the AOTF to selectively diffract a single narrow-bandpass wavelength. The wavelength may be varied by changing the applied frequency.
What is Raman-Nath theory?
At sound frequencies of a few megahertz and lower, Raman-Nath theory determines light diffraction by sound if the interaction length is no longer than about 35 cm. Imaging rules under Raman-Nath conditions are nearly the same as corresponding rules for imaging under Bragg conditions.
What is an RF driver?
An RF driver generates an RF signal that is used to generate the acoustic wave within the crystal of an AO device. … A RF driver typically consists of an RF oscillator, a modulation circuit, and a power amplifier which generates an RF signal to drive an AO device.
How do acousto-optic modulators change the direction of incoming light?
Acousto-Optic Modulator (AOM) uses a sound wave to modulate an incoming beam of light to optimize optical systems and devices. The exiting beam typically diffracts at an angle and carries a different intensity than the input beam.