Theory & general application notes
Do you know Acousto-optics ? An RF signal applied to a piezo-electric transducer, bonded to a suitable crystal, will generate an acoustic wave. This acts like a “phase grating”, traveling…
Heterodyne Fourier domain optical coherence tomography for full range probing with high axial resolution
One of the main drawbacks of Fourier domain optical coherence tomography (FDOCT) is the limited measurement depth range. Phase shifting techniques allow reconstructing the complex sample signal resulting in a…
AA Acousto-Optic & RF catalog 2022
AA OPTO-ELECTRONIC proposes the most complete range of Acousto-Optic devices covering wavelengths from 180 nm up to 11 µm including all associated Radio Frequency drivers and power amplifiers.
Fiber Lasers, Introduction
A fiber laser or fibre laser is a laser in which the active gain medium is an optical fiber doped with rare-earth elements such as erbium, ytterbium, neodymium, dysprosium, praseodymium,…
Confocal Microscopy
Confocal microscopy is an imaging technique used to increase micrograph contrast and/or to reconstruct three-dimensional images by using a spatial pinhole to eliminate out-of-focus light or flare in specimens that…
Optical Tweezers
An optical tweezer is a scientific instrument that uses a focused laser beam to provide an attractive or repulsive force, depending on the index mismatch (typically on the order of…
Variable Fiber Pigtailed Frequency Shifters
An RF signal applied to a piezo-electric transducer, bonded to a suitable crystal, will generate an acoustic wave. This acts like a “phase grating”, traveling through the crystal at the…
Pulse Pickers, Introduction
A pulse picker is an electrically controlled optical switche used for extracting single pulses from a fast pulse train.
Acousto-optic theory – 2013
Modulators – Pulses pickers, polychromatic modulators, fixed & variable frequency shifters, deflectors – AOTF, Q-Switches – Cavity Dumpers, Fiber pigtailed devices, Power Amplifiers, Fixed and variable frequency sources, Custom developments
Angular dispersion compensation for acoustooptic devices used for ultrashort-pulsed laser micromachining
Ultrashort pulsed laser material processing is a new micromachining method that is gaining interest. Its capability of submicrometer machining has been proved. To obtain high speed and highly flexible beam…
Acousto-optic lens with very fast focus scanning
We propose and experimentally demonstrate an acousto-optic cylindrical lens with a very fast (400-kHz) focal scanning. The lens is realized by use of two adjacent acousto-optic scanners with counterpropagating acoustic…
Multicolor Single-Molecule Spectroscopy with Alternating Laser Excitation for the Investigation of Interactions and Dynamics
We have developed confocal multicolor single-molecule spectroscopy with optimized detection sensitivity on three spectrally distinct channels for the study of biomolecular interactions and FRET between more than two molecules. Using…
Frequency-domain wide-field laser Doppler in vivo imaging
We present a new instrument, based on a low-frame-rate 8Hz CCD camera used in a heterodyne opticalmixing configuration, that can create wide-field laser Doppler maps. As an illustration, we show…
Q-Switches (french article)
Les lasers dits Q-switchés occupent une large place dans la famille des lasers impulsionnels. Cette technique de génération d’impulsions permet en effet d’obtenir de fortes puissances crêtes, indispensables dans de…
Basic building units and properties of a fluorescence single plane illumination microscope
The critical issue of all fluorescence microscopes is the efficient use of the fluorophores, i.e., to detect as many photons from the excited fluorophores as possible, as well as to…
Development of an atom gravimeter and status of the 10-meter atom interferometer for precision gravity measurement
Experimental realizations of cold 85Rb atom interferometers in Wuhan are reviewed in this paper. The application of atom interferometers in local gravity measurement are reported. The resolutions of gravity measurement…
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