| 摘要 |
<p>The device, which has a modular structure, makes use of Bragg gratings (2, 21, 22) for selecting, from a wavelength division multiplexed stream, a carrier to be inserted or extracted, and optical circulators (1; 11, 12; 3) for receiving the stream, for extracting and inserting the carriers and for sending the multiplexed stream to the output after the extraction and insertion of the carriers. The grating and the receiving-extracting circulator are located in a structural module (M; M1, M2; M'; M1', M2') which is replicated for all the channels to be extracted and inserted. Each module also has points accessible from the exterior (4B', 5B'; 41B', 51B', 42B', 52B'; 401A', 401D', 402A', 402D', 100A, 200A, 101A, 102A) for the connection of a plurality of modules in series, to establish the following for the multiplexed stream: A) a direct path between one input of the module and one input of the receiving and extracting circulator (1, 11, 12) of the module to which it belongs, if this is the only module or is the last of a plurality of modules; B) a second path which passes through the receiving or extracting circulator (12) and the selection means (22) of the subsequent modules, where there is a plurality of modules, and for all the modules except the last. <IMAGE></p> |
