| 摘要 |
The coupler comprises two waveguides imbedded in a substrate and exhibiting a coupling region of length L establishing coupling coefficients (C1) and (C2) for the signals of the wavelengths (.lambda.1) and (.lambda.2) respectively. Following the invention, the length (L) and the coefficients (C1) and (C2) are linked by the relationship: where n and m are integers, one uneven and the other even, chosen in such a manner as to establish a pass band of predetermined width (BP1, BP2) around at least one of the wavelengths (.lambda.1) and (.lambda.2). Application to multiplexers/demultiplexers for optical fiber telecommunications.
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