稀释气对COIL输出功率的影响
Effects of buffer gases on output power of COIL
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摘要: 研究了稀释气进气位置、稀释比以及氮气、二氧化碳、氩气作为稀释气对kW级立式N2-COIL输出功率的影响。结果表明：主稀释气从发生器进入，有利于输出功率的提高；从发生器出口进入，有利于激光器的稳定。采用不同的稀释气时，输出功率有很大的不同，但是随着稀释比的变化趋势几乎相同。以Ar作为稀释气可以降低超音速段的温度，提高小信号增益系数;据此优化设计激光器，可以提高激光器的输出功率和化学效率。以CO2气体为稀释气的激光器在低温吸附方面却有着极大的吸引力。对于不同的实验目的和要求，应该选择不同的气体作为稀释气，充分利用气体自身的优势。Abstract: The experiments were carried out on a verti-COIL, with the chlorine flowrate of 155 mmol/s, which was designed for N2. The effect on the output power was studied, with different import positions, different dilution ratios and different buffer gases, N2, Ar, and CO2. The buffer gas introduced from singlet oxygen generator(SOG) was positive to the output power and it increased with the dilution ratio within a certain range(0~1.0). The output power differed from each other when different buffer gases were used. The calculation indicated that Ar gas showed better performance in improving the small signal gain coefficient and lowering the temperature of gas.
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Key words:
- chemical oxygen-iodine laser /
- buffer gas /
- n2 /
- co2 /
- ar /
- output power /
- small signal gain coefficient
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