光纤麦克风传感探头的设计研究

Design and Research on the Sensing Probe of Fiber-optic Microphone

提出了一种新型反射式光纤麦克风的理论设计 ,首次采用了Y形单根多模反射式光纤传感探头结构的形式 ,并在对光纤传感探头的理论研究基础上建立数学模型 ,给出了接收光纤接收光强的计算公式以及光强调制的理论曲线。另外 ,从理论和实验两个方面设计了实验型光纤麦克风并给出系统设计的整体结构框图。

A novel reflective fiber optic microphone is presented. It uses the structure of Y type reflective multimode fiber sensing probe. Also, we give a mathematics model based on the theoretical research of the fiber optic sensing probe, from which we get a calculative formula of the receiving optical intensity, and analyze the optical intensity modulation property. Besides we design a structural scheme of the fiber optic microphone system from the theory and experiment.