Towards miniaturized OCT-guided laser osteotomy: integration of fiber-coupled Er:YAG laser with OCT

• Published in: Optics continuum 2023-10, Vol.2 (10), p.2106
• Main Authors: Hamidi, Arsham, Bayhaqi, Yakub A., Navarini, Alexander A., Cattin, Philippe C., Zam, Azhar, Canbaz, Ferda
• Format: Article
• Language: English
• ISSN: 2770-0208; 2770-0208
• DOI: 10.1364/OPTCON.497483

Optical coherence tomography (OCT) combined with an ablative Er:YAG laser has been recognized as a promising technique for real-time monitoring and controlling the depth of laser-induced cuts during laser osteotomy procedures. In this study, a miniaturized OCT-assisted Er:YAG laser system was developed for controlled laser ablation of bone tissue. The developed system involved coupling a high-power Er:YAG laser into a sapphire fiber with a core diameter of 425 µm and miniaturizing the sample arm of a long-range swept-source OCT system. Controlled laser osteotomy experiments were performed to evaluate the performance of the miniaturized setup. Real-time depth monitoring and control were achieved through an optical shutter controlled by the OCT system. The experimental results showed controlled ablation with a mean accuracy of 0.028 mm when targeting depths of 1 mm, 3 mm, and 5 mm on cow femur bones. These results demonstrate the potential of the developed miniaturized OCT-assisted Er:YAG laser system for use in robotic-assisted minimally-invasive laser osteotomy.