What are the differences between an acousto-optic modulator and an electro-optic modulator? Acoustic devices use sound waves to alter light amplitude, frequency or phase by modulating it using soundwaves. Electro-optic devices utilize electrical signals instead to change light intensity directly. These modulators work through the diffraction of light by sound columns in suitable interaction medium. …
Acoustic-optic deflectors play a central role in laser scanning microscopy and profilometry, offering numerous advantages over electro-mechanical scanners in terms of fast response time, high precision, and stable rasters. Acoustic-optic deflectors based on single crystal TeO2 depend on anisotropic diffraction of light. This interaction requires more complex calculations than isotropic diffraction and must be undertaken …
How Are Acoustic-Optic Deflectors Used in Laser Scanning Microscopy? Read More »
An Acousto-Optic Frequency Shifter (AOFS) is an optical modulator that modifies the frequency of an input light beam through an acoustic carrier, used to deflect or focus it for use in spectroscopy applications. AOFSs offer exceptional extinction ratio, carrier suppression and high efficiency across wide wavelength ranges; however, they require several Watts of radio frequency …
Acoustic-Optic Frequency Shifter and Laser Spectroscopy Read More »
Acousto-optic devices use sound waves to amplitude modulate, deflect or shift the optical frequency of light. An electronic signal generates this acoustic wave which is then introduced into transparent materials through piezoelectric transducers. Optic components that employ the acousto-optic effect have many applications in various fields, including laser beam shaping and steering, optical tweezers and …
Common Materials Used in Acoustic Optics Devices Read More »
Acoustic optics (AO) devices employ mechanical waves to manipulate light in various ways, including deflecting it into spatial modes, modulating its intensity, shifting frequency or rotating polarization. These devices are key components in many optical systems; however, their efficiency does not compare favorably with that of their bulk counterparts. Acoustic optical modulators Optic communication systems …
How Can Acoustic Optics Improve Optical Communication Systems? Read More »
Free-space acousto-optic modulators convert input light into various orders through periodic changes in refractive index, with this effect controlled by the strength of an RF control signal. A video signal from source 116 is fed into two AOM’s 110 and 112, activating both of them simultaneously with one amplifier 118. High Diffraction Efficiency An acousto-optic …
Advantages of Using Acoustic Optics for Laser Beam Modulation Read More »
An acousto-optic modulator uses sound waves to modify the frequency, wavelength, polarization and direction of an optical beam. AOMs have many uses including regenerative amplifiers, Q-switching and mode locking ultrafast lasers. Opposite of nonsectioned transducers, where light diffraction only takes place at one incidence angle, the transfer function of an AO cell has several maxima …
How Do Bragg Cells Work in Acoustic-Optic Applications? Read More »
The Acousto-Optic Effect (AO) is caused by periodic regions of lattice compression and rarefaction of crystal lattices when subjected to an acoustic wave, leading to light being diffracted at specific angles of incidence thm. This study seeks to investigate factors affecting the efficiency of acousto-optic interaction within an antiphase piezoelectric transducer acoustic field created through …
Factors That Affect the Efficiency of Acoustic-Optic Interaction Read More »
Acoustic-optic sensors can be used to track vibrations, flutter and atmospheric turbulence by employing donors and acceptors to absorb light that enters. Acoustic-optic sensors have been demonstrated to track a catheter during interventional MRI. The prototype sensor shows linear response to RF coil flip angle without altering any other parameters of MRI imaging. How do …
How Do Acoustic-Optic Sensors Work and Applications? Read More »
Acoustic Q-switching uses sound waves and light to switch a laser beam on and off. Sound waves compress an acousto-optic crystal, altering its index of refraction and deflecting the laser beam so it enters an on state. Acoustic waves then intercept the laser beam, transitioning it into a low-loss state, which triggers it to pulse. …
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