| 摘要 |
<p>The invention broadly comprises an optical add-drop multiplexer having at least two multi-port circulators (V, W) connected in parallel and interconnected by in-fibre Bragg gratings (40, 70) in a manner such that one port (V1) of one of the circulators (V) is arranged to receive (20) a multi-channel input signal (10) and another port (V8) of the same circulator (V) is arranged to output (80) a multi-channel output signal.</p> |
