Reliability and power density analysis of fibre Bragg gratings and thin film filter based multiplexer

Fibre Bragg gratings are used as multiplexers in dense wavelength division multiplexed telecommunication systems. The long terms reliability of optical networks depends on reliability of components, including fibre Bragg gratings. Information about the accelerating effect of both temperature and humidity is therefore essential to ensure that the devices are fit-for-purpose This paper reviews the reliability testing that was undertaken on fibre Bragg grating filter for Dense Wavelength Division Multiplexer (DWDM), channel spacing at 50 GHz and 100 GHz and the power density damage threshold of a DWDM thin-film based multiplexer.