光纤布喇格光栅应力增敏理论研究

Study about the stress sensitivity enhancement of fiber Bragg gratings

提出了一种光纤布喇格光栅应力增敏的模型,推导了该模型的应力与光纤布喇格光栅中心波长相对偏移量之间的关系,以及增敏后的光纤布喇格光栅应力响应灵敏度系数的表达式,给出了该增敏模型的弹性模量计算公式,指出通过适当选择弹性体的弹性模量和尺寸,可以提高光纤布喇格光栅应力响应灵敏度。

A stress sensitivity enhancement model of optical fi be r Bragg gratings is proposed.The relationships between stress and relative shift of center wavelength and the expression of stress sensitivity coefficient of th e enhanced fiber Bragg gratings are derived.The elastic modulus of the model is also put forward.It is pointed out that the stress sensitivity coefficient of fi ber Bragg gratings can be enhanced by properly selecting the elastic modulus and the size of the elastic part.