摘要
The effects of linear and quadratic strain on the reflective spectrum of FBG and the transmission spectrum of LPFG have been numerically investigated based on the coupled-mode equations.The results show that for the FBG or LPFG undergoing only linear strain,the reflection or transmission spectrum is symmetrical about its central wavelength,the dependence relationships of the central wavelength shift,full-width-at-half-maximum,peak intensity upon the strain gradient have been obtained.
The effects of linear and quadratic strain on the reflective spectrum of FBG and the transmission spectrum of LPFG have been numerically investigated based on the coupled -mode equations. The results show that for the FBG or LPFG undergoing only linear strain, the reflection or transmission spectrum is symmetrical about its central wavelength, the dependence relationships of the central wavelength shift, full-width-at-half-maximum, peak intensity upon the strain gradient have been obtained.
基金
supported by the Cultivation Fund of the Key Scientific and Technical Innovation Project,Ministry of Education of China(NO:708064)
