A compact subsonic CW chemical oxygen-iodine laser (COIL) was firstly used as a probe to measure the temporal and spatial dependence of the small-signal gain in a supersonic CW COIL.

• 首次利用一台亚音速小型连续波化学氧碘激光器做探测光源，用放大法直接测量超音速化学氧碘激光器的小信号增益系数，测得了小信号增益系数随时间和气流方向的变化。