This document applies to the family of fibre optic filters. These components have all of the following general features:
– they are passive for the 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 cannot
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;– they differ according to their characteristics. They can be divided into the following
categories:• 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 an optical window is allowed);• notch (only an optical window is inhibited);• gain flattening (compensating the spectral profile of the device).
It is also possible to have a combination of the above categories.All current amendments available at time of purchase are included with the purchase of this document.