10.ナノ秒レーザー光による液体の光破壊確率の実験

概要

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Probabilistic behavior of optical breakdown in water is investigated as a function of the laser intensity using Q-switched lasers with 5〜6 nsec duration and is compared with the breakdown probability of air in which a avalanche mechanism is believed to govern the breakdown process. These results suggest us a mechanism of optical breakdown is the following. Initial electrons are supplied from liquid itself or impurities in liquids by multiphoton absorption process. These seed electrons absorb laser radiation thorough collision with liquid molecules and acquires sufficient energy to induce avalanche ionization of liquid molecules.
近畿大学の論文