The F-WDM-S11315-FCUPC Single Mode Wavelength Division Multiplexer uses fused fiber technology. This 1 x 2 WDM is used to separate or combine optical signals at the 1310 ±20 nm and 1550 ±20 nm operating wavelengths allowing for bidirectional communications on a single fiber. WDMs offer high isolation between the two wavelengths with low excess loss. This version has fiber pigtails with FC/UPC connectors.