This category covers the main product range of passive optical fiber components. These passive components are used to construct the optical fiber transmission, conditioning or sensoring systems. Optical power, wavelength, polarization and transmission path can be changed, modified and managed using these components. Attenuators: optical power management; couplers and WDM couplers: optical links or circuits construction; isolators and circulators: transmission management; WDM modules: wavelength division multiplexing and management; optical switch: dynamic control of the optical path.