Numerical analysis of fiber Bragg grating and long period fiber grating undergoing linear and quadratic temperature change

作者：Yuan Yinquan^*; Ding Liyun

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2009, 24(6): 952-955.

DOI：10.1007/s11595-009-6952-x

• temperature gradient
• fiber Bragg grating
• long period fiber grating
• coupled-mode theory
• simulation

The coupled-mode equations for fiber Bragg grating (FBG) and long period fiber grating (LPFG) undergoing linear and quadratic temperature change were given. The effects of temperature gradient and quadratic temperature change on the reflectivity spectrum of fiber Braggs grating and the transmission spectrum of long period fiber grating were investigated using the numerical simulation, and the dependence relationships of the central wavelength shift, the full-width-at-half-maximum, and the peak intensity upon temperature gradient were also obtained. These relationships may be used to design a novel fiber optical sensor which can simultaneously measure the temperature and temperature gradient.

• 出版日期2009-12
• 单位武汉理工大学