Packaging and isolating microsphere coupling system

Optical microresonantors are widely researched for a number of applications, especially microcavity-based sensors. However, the transmission characteristic is prone to be affected by the surrounding. In this paper, a novel method to isolating the microcavity coupling system is presented. The Selection principle for packaging material is discussed and the details of packaging process are introduced. Resonant whispering gallery models (WGMs) are tested for microsphere system, no packaging and packaged respectively. Proof tests were also carried out to check the isolation. Experiments showed that, package the coupling system is an effective method to isolate coupling system from surrounding environment. Moreover, the packaged body was also function as a fixed retainer, used for fix the position of microcavity and tapered fiber.