The Detection of Explosive Cyclotrimethylenetrinitramine (RDX) Using Optical Microcavity

Figure 2

Schematic of the silica or quartz microsphere type whispering gallery mode (WGM) microcavity. The coupling method we use is critical coupling, and there is a small gap between the optical fiber and the microcavity, the fiber is not placed on the periphery of the sphere.