| 摘要 |
PCT No. PCT/GB97/00616 Sec. 371 Date Sep. 2, 1998 Sec. 102(e) Date Sep. 2, 1998 PCT Filed Mar. 5, 1997 PCT Pub. No. WO97/37446 PCT Pub. Date Oct. 9, 1997Wavelength division multiplexed transmission line functions of chromatic dispersion compensation and channel drop are performed by a node having a concatenated series of wavelength selective dispersion compensating elements and switches. The switches are arranged to selector or bypass each wavelength selective dispersion compensating element. If a wavelength selective dispersion compensating element is appropriately selected, the corresponding channel is dispersion compensated and reflected to a drop port. Any remaining channels are circulated by the switches to the remaining dispersion compensating elements where they are dispersion compensated and reflected to an optical output. In the preferred examples, the node includes an insert port to allow multiplexing of additional channels. This allows the node to perform both drop and insert functions in addition to dispersion compensation and so forms a dispersion compensating drop and insert node.
|
