Fiber optical coupler 1,High return loss 2,Low PDL 3,Low insertion loss Fiber optical couplerType :Single window single ... system4, FTTH5, Monitoring system6, Optic fiber sensor7, Testing devicesFeatures:1, Low excess loss2, Customized packaging available3, Environmentally stable4, High ... Configuration1 to 2, 1 to 3, 1 to N, 2 to 2, 2 to 3, 2 to N, User-defined 1*3 Fiber optical coupler