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为进一步提高氧碘化学激光器效率,提出一种不改变激光器结构,仅变换主副载气的方法。在增益区长度为11.7 cm的激光器上进行实验,以N2,Ar和CO2做为氧碘化学激光器的主载气或副载气,对激光器的输出功率和化学效率进行了研究。实验结果表明,平均分子质量改变对主副气流的混合是有利的,因而可以提高激光器的输出效率。当N2为主载气,Ar为副载气时,激光器输出功率和化学效率最高,分别达到3.09 kW,30.2%。
In order to further improve the efficiency of oxygen-iodine chemical lasers, a method of changing only the main carrier gas and carrier gas without changing the structure of the laser is proposed. Experiments were carried out on a laser with a gain of 11.7 cm in length. The output power and chemical efficiency of the laser were studied using N2, Ar and CO2 as the main carrier or carrier gas for the oxy-iodine chemical laser. The experimental results show that the change of average molecular weight is beneficial to the mixing of the main gas and the secondary gas, so the output efficiency of the laser can be improved. When N2 is the main carrier gas and Ar is the carrier gas, the laser output power and chemical efficiency are the highest, reaching 3.09 kW and 30.2% respectively.