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以前所提到的液体激光器激活介质,不仅包含有稀土离子,也包含有重金属卤化物及二氯氧化硒。由于二氯氧化硒含量高,因此这种液体介质毒性很大,操作时需特别注意,要有复杂的防护设施。另外,其光化稳定性及耐热性能也需要改进,且由于粘度高,使循环泵系统发生了困难。本专利介绍的液体介质,毒性很小,因而操作简便;光化稳定性及耐热性也好,且粘度低,大大简化了激光器光学系统的循环泵部分。在这种液状激活介质中,氯氧化物取代了二氯氧化硒,或除了极少量的二氯氧化硒以外,主要部分是三氯氧化磷(POCl_3)。三氯氧化磷的重量百分比最好是40～98。在典型试验实例中,重金属卤化物是锡、钛、钙或铪的化合物,激活离子为钕、饵或
The previously mentioned liquid laser activation medium contains not only rare earth ions but also heavy metal halides and selenium dichloride oxide. Due to the high content of selenium dichloride, this liquid medium is very toxic and requires special attention during operation and requires complex protective equipment. In addition, its photochemical stability and heat resistance also need to be improved, and due to the high viscosity, the circulation pump system is difficult. The liquid medium described in this patent has very little toxicity and therefore is easy to handle. The photochemical stability and the heat resistance are also good, and the viscosity is low, which greatly simplifies the circulating pump part of the laser optical system. In this liquid activating medium, the oxychloride replaces selenium dichloride or, except for very small amounts, selenium oxychloride, the major part is phosphorus oxychloride (POCl 3). The weight percentage of phosphorus oxychloride is preferably from 40 to 98% by weight. In a typical experimental example, the heavy metal halide is a compound of tin, titanium, calcium or hafnium, the activating ions are neodymium, bait or