氧碘化学激光器运行模式对其脉冲化影响的模拟研究  

Theoretical research of the influence of operation mode of chemical oxygen-iodine laser on its pulsing

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作  者:李国富[1,2] 多丽萍[1] 金玉奇[1] 于海军[1] 汪建[1] 王德真[2] 桑凤亭[1] 

机构地区:[1]中国科学院化学激光重点实验室,大连化学物理研究所,大连116023 [2]大连理工大学物理与光电工程学院,大连116024

出  处:《物理学报》2012年第10期184-188,共5页Acta Physica Sinica

摘  要:根据氧碘化学激光器的反应机理建立了一维预混脉冲出光理论模型,从理论上研究了气体总压力在660—2660 Pa,温度在150—400 K区间内对单脉冲能量、脉宽和峰值功率的影响.分析了气体总压和温度对出光特性影响的内在原因.计算结果表明:增益介质温度对单脉冲能量的影响要远大于对激光脉宽的影响;增益介质温度在150 K,气体总压在1330 Pa可以获得比温度在400 K,气体总压为2660 Pa时更高的峰值功率.因此在不干扰超音速流动状态条件下瞬间大量产生碘原子,可以实现高效的脉冲氧碘化学激光器.Abstract One-dimensional pre-mixed model for a pulsed chemical oxygen-iodine laser is presented according to the reaction mechanism in chemical oxygen-iodine laser. The influences of gas temperature of 150--450 K and pressure of 660-2660 Pa on single pulse energy, pulse duration and peak power are studied. The internal reason of the influences of pressure and temperature on laser characteristics is analyzed. The results show that the higher laser peak power can be obtained in the case of gas temperature of 150 K and pressure of 1330 Pa than in the case of 400 K and 2660 Pa. Thus an efficient pulsed chemical oxygen-iodine laser is promising if the abundant atomic iodine is generated instantaneously. The approach to atomic iodine generation does not disturb the state of supersonic flow.

关 键 词:碘原子 脉冲 氧碘化学激光 超音速 

分 类 号:TN248.5[电子电信—物理电子学]

 

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