一、引言本文讨论的光纤应变传感器是把光纤本身当作应变敏感元件,即它是一种本征应变传感器。在该测量系统中,应变调制经过光纤的光相位,因此,光检测系统必将包含有某种形式的干涉仪。本征光纤传感器比非本征传感器更为优越。因为,对前者,在光的调制和接收过 I. INTRODUCTION The fiber strain sensor discussed in this paper treats the fiber itself as a strain sensitive element, ie it is an intrinsic strain sensor. In this measurement system, the strain is modulated through the optical phase of the fiber, so that the light detection system will necessarily contain some form of interferometer. Intrinsic fiber sensors are superior to non-intrinsic sensors. Because, of the former, modulation and reception of light