A one-dimensional finite difference model has been used to investigate the temperature distribution within thulium fibre
laser-irradiated tissue. Temperature-time and temperature-depth
profiles are presented for various laser stimulus parameters in
the 2 micron region. These current calculations are aimed at
determining theoretical temperature distributions in the application of relatively low power fibre lasers for thermal stimulation of cutaneous nerves in human pain processing. Theoretical skin surface temperatures are compared with those from thermal camera measurements during thulium fibre laser irradiation. The effectiveness of the thulium fibre laser for thermally stimulating cutaneous nerves is confirmed.
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