TF-WDM filters for 50- and 100-GHz channel spacing are offered by TeraXion. They were designed to separate channels down to 50 GHz and to select and isolate wavelengths of the ITU grid. Based on fiber Bragg grating technology, the filters provide thermal wavelength stability throughout a -20 to +70 °C operating temperature range and flattop response with a steep spectral roll-off. In addition, they feature high side-lobe suppression, center wavelength accuracy and high channel reflection. TF-WDM filters can be integrated into DWDM mux/demux devices, optical add/drop modules and interleavers.