Vol. 35, Issue 2, pp. 277-282 (2005)
Keywords
optical fiber communication, fiber Bragg grating, negative thermal-expansion material, temperature-compensated package, PMD
Abstract
A temperature-compensated material of fiber Bragg grating (FBG), which has negative thermal-expansion coefficient has been presented. The temperature coefficient of FBGs’ center wavelength is less than 0.0005 nm/°C after three-layer-structure temperature-compensated package under tension. For the first time, PMD of FBG with and without temperature compensation has been detailedly studied and measured from –20 to 60°C. The measured result shows that the PMD changes a little at varying temperature, which means that the package did not affect the PMD characteristic of FBG.