A Packaging Structure with the Capability of Vibration and Sound Isolation of the Fiber Interferometer Based on the Method of Suspension Type

Abstract

In this few years with the development of the application of the technique about the fiber sensing in several areas with the bad testing environment, it demands the packaging structure of the fiber interferometer, the center device in the fiber sensing system, with the remarkable capability of vibration and sound isolation. However, the performance index of the such product is still far from the requirement. Based on the method of suspension type we first produce the sound isolation device with the two-part vibration isolation structure. Then during a series of tests we find that it has the remarkable capability of vibration and sound isolation, the capability of sound isolation is higher than 40dB in the whole range of the testing frequencies and the well capability of vibration isolation, which reach to as most as 60dB and at least as 20dB, has been shown above 5Hz.