Acousto-optic Scanning Spatial-switching Multiphoton Lithography

Acousto - Optic Isolator ( Aoi )

Two-Element Phased-Array Acousto-Optic Deflector at High Diffraction Efficiency: Scanning Range Broadening

An acousto-optic deflector with a two-element phased-array piezoelectric transducer is investigated at high diffraction efficiency (close to 100%). Significant broadening of the frequency band (and, thus, the angular scanning range) relative to the well-known low efficiency regime is theoretically predicted and experimentally demonstrated. Experiments with an off-axis deflector based on paratel...

Dynamic wavefront shaping with an acousto-optic lens for laser scanning microscopy.

Acousto-optic deflectors (AODs) arranged in series and driven with linearly chirped frequencies can rapidly focus and tilt optical wavefronts, enabling high-speed 3D random access microscopy. Non-linearly chirped acoustic drive frequencies can also be used to shape the optical wavefront allowing a range of higher-order aberrations to be generated. However, to date, wavefront shaping with AODs h...

Different Plastic Materials Based Acousto-optic Modulators (AOMs) Design Considerations for Fast Switching Applications

An acousto-optic modulator (AOM) allows to diffract a laser beam going through a crystal from the incidence angle (order 0) to another angle (order 1). The diffracted beam intensity depends on the radio frequency (RF) power applied to the device while the output angle depends on the material but is also proportional to the laser wavelength and to the RF drive frequency. When only intensity modu...

Nonlinear effects in acousto-optic imaging.

Acousto-optic (AO) imaging is a promising technique that is able to reveal optical properties in the millimeter range inside scattering media by tagging the photon paths with an ultrasonic beam. To increase both the contrast and the resolution of the AO images, we have explored the possibility of using the nonlinear response of the speckle modulation. Variation of the second-harmonic signal as ...