Iridian’s dual band filters have proved to be very popular in recent CWDM designs as they can reduce the number of required filters (and the associated packaging and alignment), minimize insertion loss and allow more compact module packaging.

CWDM Dual Band filters are used to transmit one or more standard CWDM channels in two separate bands, also available for custom band width design in each band.

Iridian also offers multiple bandpass (or notch) spectroscopic filters for the uv-visible-IR spectral regions. These filters typically have bandpass regions with transmittance > 90% and blocking to OD > 6. The filters can have 2, 3 or even 4 band regions to allow use of multiple excitation sources or emission bands as required by the customer application.