Theoretical study of Acousto-optical coherence tomography using random phase jumps on US and light
Max Lesaffre (LKB - Lhomond), Salma Farahi, A.C. Boccara, Fran\c{c}ois, Ramaz, Michel Gross (LKB - Lhomond, L2C)
TL;DR
This paper provides a theoretical analysis of Acousto-Optical Coherence Tomography (AOCT), demonstrating that tagged photons remain coherent within specific z regions, which enhances depth resolution in ultrasonic modulation imaging.
Contribution
It offers a theoretical framework for AOCT, showing how coherence is maintained within certain z regions, improving understanding of depth selectivity in AOCT.
Findings
Tagged photons remain coherent within specific z regions.
Quantification of z selectivity for tagged photon and photorefractive signals.
Theoretical validation of AOCT's depth resolution capabilities.
Abstract
Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous Wave (CW) beams. We describe here theoretically the AOCT e ect, and we show that the Acousto Optic tagged photons remains coherent if they are generated within a speci c z region of the sample. We quantify the z selectivity for both the tagged photon eld, and for the M. Lesa re et al. photorefractive signal.
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