Abstract
The cause of the change in the optical path lengthΔ(nd) of the saturable absorbing dye-doped polymer films under laser irradiation is investigated using polyvinyl alcohol and gelatin films doped with erythrosin B. The temperature rise of the dye-doped films, the changes in optical path length, film thickness, the refractive index and the optical density of the dye-doped films are measured under laser irradiation. The thermal expansion due to the temperature rise of the dye-doped films caused by the irradiation has greater effect on theΔ(nd) than the fading of dye molecules due to the irradiation of laser beams.
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Nakagawa, K., Kawano, K. Change in optical path length of saturable absorbing dye-doped polymer films under laser irradiation. Optical Review 3, 216–220 (1996). https://doi.org/10.1007/BF02931723
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DOI: https://doi.org/10.1007/BF02931723