Interaction of 1.319 μm laser with skin: an optical-thermal-damage model and experimental validation

Luguang Jiao; Zaifu Yang; Jiarui Wang

doi:10.1117/12.2069216

17 September 2014 Interaction of 1.319 μm laser with skin: an optical-thermal-damage model and experimental validation

Luguang Jiao, Zaifu Yang, Jiarui Wang

Proceedings Volume 9230, Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014); 923012 (2014) https://doi.org/10.1117/12.2069216
Event: Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 2014, Wuhan, China

Abstract

With the widespread use of high-power laser systems operating within the wavelength region of approximately 1.3 to 1.4 μm, it becomes very necessary to refine the laser safety guidelines setting the exposure limits for the eye and skin. In this paper, an optical-thermal-damage model was developed to simulate laser propagation, energy deposition, heat transfer and thermal damage in the skin for 1.319 μm laser irradiation. Meanwhile, an experiment was also conducted in vitro to measure the tempreture history of a porcine skin specimen irradiated by a 1.319 μm laser. Predictions from the model included light distribution in the skin, temperature response and thermal damge level of the tissue. It was shown that the light distribution region was much larger than that of the incident laser at the wavelength of 1.319 μm, and the maximum value of the fluence rate located on the interior region of the skin, not on the surface. By comparing the calculated temperature curve with the experimentally recorded temperautre data, good agreement was shown betweeen them, which validated the numerical model. The model also indicated that the damage integral changed little when the temperature of skin tissue was lower than about 55 °C, after that, the integral increased rapidly and denatunation of the tissue would occur. Based on this model, we can further explore the damage mechanisms and trends for the skin and eye within the wavelength region of 1.3 μm to 1.4 μm, incorporating with in vivo experimental investigations.

Citation Download Citation

Luguang Jiao, Zaifu Yang, and Jiarui Wang "Interaction of 1.319 μm laser with skin: an optical-thermal-damage model and experimental validation", Proc. SPIE 9230, Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 923012 (17 September 2014); https://doi.org/10.1117/12.2069216

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KEYWORDS

Skin

Tissue optics

Monte Carlo methods

Laser tissue interaction

Eye models

Tissues

Laser irradiation

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