| 摘要 |
<p>The network has an optical ring link (F) and a concentrator (HUB) that sends via one end of the downlink, optical signals carried by respective wavelengths. The links are divided into a set of segments separated by access nodes. Each access node has coupling unit that are not wavelength-selective. A rejection filter is inserted into a segment to reject a portion of the wavelengths.</p> |
