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Thin Film Filter WDM Techniques for Optimizing Assembly Process

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Thin Film Filter WDM Techniques for Optimizing Assembly Process

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  • Author: Miranda Sciarra
With the increasing number of fiberoptic component manufacturers, there are several designs of WDMs to choose from. The most recognized in the industry are Thin Film Filters (TFF), Arrayed Waveguide Gratings (AWG) and Fiber Bragg Gratings (FBG). Each inherits different design technologies and optical components necessary to complete the function of a WDM device. The technology of TFF WDM could be the simplest means of performing Wavelength Division Multiplexing. This method uses thin film filters which act as a multiplexer and demultiplexer within the device. These filters can reflect or transmit single wavelengths depending on the properties of the coating that is applied to the TFF. TFFs will absorb a very small amount of light (or small portion of the spectrum) reflecting the remaining light (all other parts of the spectrum). TFFs are part of a series of components that together form the WDM.

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