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.
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。
3
Furthermore, the GJ-4 confocal probe uses an avalanche diode with high responsivity. Therefore, it can get better measuring signals from low-reflective surfaces.