Passive coarse wavelength division multiplexing (CWDM) is a method of multiplexing (mux) and de-multiplexing (demux) optical signals over fiber optic transmission cables. It is considered a cost effective method for scaling connections over existing fiber infrastructure for point-to-point (P2P) or point-to-multipoint (P2M) connections for add/drop or fiber ring applications. Both passive CWDM cassettes and barrel filters are useful in a wide range of applications that benefit from the aggregation and separation of fiber channels. These applications include telecommunications, R&D< test lab, research and mil/aero installations, among other applications that require extensions of existing fiber infrastructure.... Read more