Staveteig P T, Walsh J T
Appl Opt. 1996 Jul 1;35(19):3392-403. doi: 10.1364/AO.35.003392.
Previous assumptions that water is not a 193-nm chromophore during ArF excimer laser tissue ablation are based on room-temperature data and ignore spectroscopic literature that suggests a strong temperature dependence of far-ultraviolet water absorption. By the use of a Q-switched Er:YAG laser as a pump source and an ArF excimer laser as a probe source, thermal generation and relaxation of 193-nm water absorption were characterized under nonequilibrium high-temperature and high-pressure conditions. At volumetric energy densities as small as 2 kJ/cm(3) relative to room temperature, the 193-nm absorption coefficient of water was measured to increase by more than 5 orders of magnitude. These results are consistent with the hypothesis that the absorption of 193-nm radiation by water may play a role in ArF excimer laser ablation of tissue.
先前关于在ArF准分子激光组织消融过程中水不是193纳米发色团的假设是基于室温数据，并且忽略了表明远紫外水吸收强烈依赖温度的光谱学文献。通过使用调Q Er:YAG激光作为泵浦源和ArF准分子激光作为探测源，在非平衡高温高压条件下对193纳米水吸收的热产生和弛豫进行了表征。相对于室温，在低至2 kJ/cm³的体积能量密度下，测得水的193纳米吸收系数增加了超过5个数量级。这些结果与水对193纳米辐射的吸收可能在ArF准分子激光组织消融中起作用的假设一致。
