... :Single window single mode wideband fiber coupler Dual window single mode wideband fiber coupler Multimode optic fiber coupler Frame couplerApplications:1, CATV2, LAN ... , Environmentally stable4, High return loss5, Low PDLTechnical:---single mode wideband coupler as an exampleWavelength1310nm or 1550nm, 1310nm and 1550nmBandwidthMore or less ... 3, 2 to N, User-defined 1*2 Fiber optical coupler