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4 March 1993 End coating on optical fibers for multiplexers-demultiplexers in optical communications
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Economical multiplexers-demultiplexers can be made from cut optical fibers coated at their ends with multidielectric filters and then put together. An optical multilayer deposited at the end of a fiber has a spectral response which is different from that obtained when the multilayer is classically used in oblique incidence. We show that it is possible to forecast the multi- demultiplexer performances on multimode fibers with a numerical model using a divergent beam of angular width `a' at a mean incidence `i.' As we know the design of the multilayer used, we can correctly predict the cross-talk and the losses of multi-demultiplexers. Then we show how a series of different experiments are exploited for this study. Nevertheless, the development of a higher selectivity spectral filter and the use of a single mode fiber necessitate further improvement concerning the test for the validity of the model used.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert Richier, Catherine Grezes-Besset, and Emile P. Pelletier "End coating on optical fibers for multiplexers-demultiplexers in optical communications", Proc. SPIE 1782, Thin Films for Optical Systems, (4 March 1993);

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