A tunable diode laser was used to probe the gain spectra and profile of a supersonic COIL. The cavity temperature was obtained based on Doppler broadening.
利用可调谐二极管激光器做探测光源，测量了超音速氧碘化学激光的增益谱线和增益线型。根据多普勒展宽，间接得到了超音速氧碘激光器的腔内温度。
It consists of light emitting diode, an optical fiber probe, and two photodetectors.
该光纤式振动计由发光二极管、光纤探头和两个光子探测器组成。
Furthermore, the GJ-4 confocal probe uses an avalanche diode with high responsivity. Therefore, it can get better measuring signals from low-reflective surfaces.
GJ-4型测头的光电接收器件使用高响应度的雪崩光电二极管，能够对一些弱反射表面获取到较好的测量信号；
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