Abstract
Pulsed Laser diodes stacks (PLD) are a promising low cost option as laser sources for Optical Resolution Photo acoustic Microscopes (ORPAM). Nevertheless, their multimode beams with wide divergences and non-uniform light distributions, imposes limitations to the lateral resolution that can be achieved at a long laser focusing distance needed for clinical applications. Here, it is devised a new strategy to attain high lateral resolutions at a centimeter-long working distance, based on coupling the PLD power into a square core multimode optical fiber. An ORPAM system with an ultrasound linear phased-array in reflection confocal mode was built to test its performance.
BibTeX citation
@inproceedings{JuanjoIEEE2022,
author = {Juan J. García-Garrigós and Alejandro Cebrecos and Javier A. Navarro-Calvo and Noé Jiménez and José M. Benlloch and Francisco Camarena},
booktitle = {IUS 2022: IEEE International Ultrasonics Symposium. Venice, Italy. 10-13 October},
doi = {https://doi.org/10.1109/IUS54386.2022.9957264},
editor = {2022 IEEE International Ultrasonics Symposium (IUS)},
isbn = {ISBN: 978-84-87985-30-4},
month = {10},
organization = {Institute of Electrical and Electronics Engineers},
pages = {1-4},
publisher = {IEEE},
series = {Oral},
title = {Laser Diode Beam Shaping and Homogenization with a Multimode Fiber applied to Optical Resolution Photoacoustic Microscopy based on Linear Phased Array Ultrasound Probe},
url = {https://ieeexplore.ieee.org/document/9957264},
year = {2022}
}