Red/Blue filter is an additional passive component for WDM optical networks. It is often used to increase bandwidth and reduce link insertion loss in high-channel count DWDM systems. Actually, it is just like a regular Filter-based WDM (FWDM), with the only difference that the wavelengths are split in Red/Blue filter while bonded in WDM. DWDM Red/Blue C-band Filter is used to separate or combine Red and Blue band wavelength signals in C-band DWDM systems and high-power amplification systems. Fiber-Mart provides custom channel and custom band filters to meet special control and applications. The filter units are available with steel tubes, ABS boxes, rack mounts or custom mount designs.