DIN EN 61977:2010-12

This International Standard applies to the family of fibre optic filters. These components have all of the following general features: - they are passive fort he reason that they contain no optoelectronic or other transducing elements which can process the optical signal launched into the input port; - they modify the spectral intensity distribution in order to select some wavelengths and inhibit others; - they are fixed, i.e. the modification of the spectral intensity distribution is fixed and can not be tuned; - they have input and output ports or a common port (having both functions of input and output)for the transmission of optical power; the ports are optical fibre or optical fibre connectors: - short-wave pass (only wavelengths lower than or equal to a specified value are passed); - long-wave pass (only wavelengths greater than or equal to a specified value are passed); - band -pass (only and optical window is allowed); - notch (only an optical window is inhibited). Iit is also possible to have a combination of the above categories. This Standard establishes uniform requirements for optical, mechanical and environmental properties.