AI Article Synopsis
- Acousto-optic imaging (AOI) for detecting objects in thick, scattering media is difficult due to weak signals, which complicates image reconstruction.
- Researchers developed a new laser source that combines two pulsed amplifiers, producing 9 W peak power with short 100-µs pulses, while keeping average power under 100 mW.
- This setup, paired with advanced digital holographic detection techniques, successfully achieved near-video frame rate imaging of 2-cm-thick scattering media for the first time.
Article Abstract
Acousto-optic imaging (AOI) of absorbing objects embedded in highly scattering media remains challenging, since the detectable signal suitable for image reconstruction is weak. To increase the detected signals to a level required by live biological applications, we designed a high-peak-power quasi-continuous laser source based on the coherent combination of two pulsed amplifiers, delivering 100-µs-long pulses with a 9 W peak power at a 100 Hz repetition rate while maintaining an average power below 100 mW; jointly used with a digital holographic detection that maximizes the amount of collected signal, we demonstrate for the first time to our knowledge the optical imaging of 2-cm-thick highly scattering media (µ' ∼ 10 cm) at near-video frame rate (0.2 Hz) using the Fourier transform-AOI.
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| http://dx.doi.org/10.1364/OL.528953 | DOI Listing |
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