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Proceedings Paper

Optical coherence tomography in material deformation by using short pulse laser irradiation
Author(s): Eun Seo Choi; Wooseop Kwak; Yongjin Shin; Youngseop Kim; Woonggyu Jung; Yeh-Chan Ahn; Zhongping Chen; Eun Joo Jeong; Chang-Seok Kim
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Paper Abstract

We demonstrate the feasibility of OCT imaging for the investigation of samples, which are processed by the short pulse laser. The use of short pulse lasers in various material processing have provided the advantages such as a high peak power and a small heat affected zone over conventional methods based on mechanical treatment. However, due to the improper application of the lasers, the unwanted surface or structural deformation of materials and the thermal damages around an irradiation spot can be caused. Thus, the real-time monitoring/evaluation of laser processing performance in-situ is needed to prevent the excessive deformation of the material and to determine optimal processing conditions. As a standard method to investigation of the material processing by using the lasers, the scanning electron microscopy (SEM) or the transmission electron microscopy (TEM) observation of a physically cleaved surface is used although sample damages are given during the cleaving and polishing process. In this paper, we utilized the OCT advantages such as high resolution and non-invasive investigation to evaluate the laser processing performance. OCT images for the deformation monitoring of the ABS plastic present correlation with images obtained from conventional investigation methods. OCT images of the maxillary bone clearly show the difference in the pit formation of the biological sample at different irradiation conditions. We prove the potential of OCT for the evaluation of laser-processed various samples. Integrating OCT system into a laser processing system, we can visualize the effect of laser-based treatments in clinical and industrial fields.

Paper Details

Date Published: 18 February 2008
PDF: 8 pages
Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68470W (18 February 2008); doi: 10.1117/12.767031
Show Author Affiliations
Eun Seo Choi, Chosun Univ. (South Korea)
Wooseop Kwak, Chosun Univ. (South Korea)
Yongjin Shin, Chosun Univ. (South Korea)
Youngseop Kim, Gwangju Institute of Science and Technology (South Korea)
Woonggyu Jung, Univ. of California/Irvine (United States)
Yeh-Chan Ahn, Univ. of California/Irvine (United States)
Zhongping Chen, Univ. of California/Irvine (United States)
Eun Joo Jeong, Pusan National Univ. (South Korea)
Chang-Seok Kim, Pusan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 6847:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII
Joseph A. Izatt; James G. Fujimoto; Valery V. Tuchin, Editor(s)

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