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用于激光同位素分离项目的主振荡器功率放大器（ＭＯＰＡ）组合的铜蒸气激光系统（ＣＶＬ）在日本得到了发展。用９ ｃｍ直径，３５０ ｃｍ放电长度的放大器已成功获得６５０ Ｗ的最大输出功率。采用４ ｃｍ管芯的小型主振荡器和４级９ ｃｍ管芯的功率放大器的组合进一步得到２．４ ｋＷ（最高２．４６ ｋＷ）的ＭＯＰＡ输出功率。研制了一种热计算程序，用于在大体积上保持最佳铜蒸气密度。还提出新的绝热结构设计法，将两个不同的绝热体相结合以保持激光管的纵向温度分布尽量平坦。ＣＶＬ放电电路也得到改进，方法是使用了一个极好的磁开关，它可在４．４ ｋＨｚ的重复率上向ＣＶＬ提供约９０ ｋＶ、４０００ Ａ的脉冲。本文报道了此种ＣＶＬ的设计方法并给出所设计的高功率ＣＶＬ系统的性能。
The copper vapor laser system (CVL), a combination of main oscillator power amplifier (MOPA) for laser isotope separation projects, has been developed in Japan. An amplifier with a discharge length of 9 cm in diameter and 350 cm has successfully achieved a maximum output power of 650 W. The combination of a 4-cm small main oscillator and a 4-level 9-cm die boost further yields MOPA output power of 2.4 kW (up to 2.46 kW). A thermal calculation program was developed for maintaining optimal copper vapor density over a large volume. A new adiabatic design method is also proposed, combining two different insulators to keep the longitudinal temperature distribution of the laser tube as flat as possible. The CVL discharge circuit has also been improved by using an excellent magnetic switch that provides a pulse of about 90 kV, 4000 A to the CVL at a repetition rate of 4.4 kHz. This paper reports the design method of this kind of CVL and gives the performance of the designed high power CVL system.