近共振传能放热对氧碘化学激光器性能的影响

在氧碘化学激光器(COIL)中,O2(1Δ)与I的近共振传能反应是一个放热反应;它与水汽等的猝灭放热反应一样会对激射过程产生不利影响,而且是不可避免的。计算了猝灭放热效应对光腔气动特性输出功率的影响。得到了近共振传能放热的大小与粒子数反转和激射的光子数相关,即与光腔内的增益、光场强度分布成正比,故主要发生在激光器的上游区前半部分。模型计算表明,其影响程度大致相当于7%水汽所致的对氧碘化学激光器的影响。完善了氧碘化学激光器理论计算模型。

Effects of Heat Release from Near-Resonant Energy Transfer on Chemical Oxygen-Iodine Laser

In chemical oxygen-iodine laser (COIL), the near-resonant energy transfer reaction between O2(1Δ2) and I is a process of heat release, which is harmful to the stimulated emission as the heat release reaction caused by vapor quenching and unaviodable. The influence of quenching heat release on pneumatic properties of resonator and output power is calculated. The magnitude of near-resonant energy transfer is related to the population inversion and stimulated emission, in other words, is proportional to the gain of resonator and intensity distribution of laser, so this effect mainly occurs at the front part of the entrance of resonator. The effects almost are equivalent to the quenching by 7% H2O population influencing on chemical oxygen-iodine laser, and the theoretical model for chemical oxygen-iodine laser is improved.