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Updated: Mar 30, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy

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Published on: May 3, 2011

Fast spatial beam shaping by acousto-optic diffraction for 3D non-linear microscopy.

Walther Akemann, Jean-François Léger, Cathie Ventalon

|November 13, 2015

Summary

This summary is machine-generated.

This study presents a novel acousto-optic deflection (AOD) modulator for stable phase modulation of ultra-short laser pulses. The device overcomes non-stationarity issues, enabling precise control of light beam phase at high repetition rates.

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Area of Science:

Optics and Photonics
Laser Physics
Acousto-Optics

Background:

Acousto-optic deflection (AOD) devices provide rapid control over light beam spatial structures, particularly phase.
Modulating ultra-short laser pulses with AODs is challenging due to chromatic dispersion and diffraction non-stationarity.

Purpose of the Study:

To demonstrate an efficient AOD light modulator for stable phase modulation of ultra-short laser pulses.
To address the obstacle of non-stationarity in acousto-optic diffraction for high-power laser systems.

Main Methods:

Implementation of time-locked generation of frequency-modulated acoustic waves.
Operating the acousto-optic modulator at the full repetition rate (80 kHz) of a high-power laser pulse amplifier.
Establishing the non-local relationship between optical phase and acoustic frequency function.

Main Results:

Demonstrated stable phase modulation for ultra-short laser pulses.
Achieved temporal stability and high phase accuracy.
Successfully generated non-linear two-dimensional phase functions.

Conclusions:

The developed AOD light modulator effectively overcomes non-stationarity challenges.
The system enables precise and stable phase control for high-power, high-repetition-rate laser systems.
This advancement facilitates advanced applications requiring dynamic control of light beam phase.