Packaging of optical Fibre Bragg Gratings

Fibre Bragg Gratings (FBGs) are all-fibre optical filters with applications in sensing and telecommunication systems. The packaging of FBGs offers many challenges to the manufacturer as stringent tolerances for wavelength stability of the filter over widely varying environmental operating conditions are required for state of the art Dense Wavelength Division Multiplexing (DWDM) telecommunication systems. This paper presents various processes and packaging techniques that have been developed for FBGs in order to meet these requirements.