| 摘要 |
PCT No. PCT/SE95/01095 Sec. 371 Date Apr. 3, 1997 Sec. 102(e) Date Apr. 3, 1997 PCT Filed Sep. 26, 1995 PCT Pub. No. WO96/11537 PCT Pub. Date Apr. 18, 1996Optical coupling systems that include optical NxN wavelength cross-connectors, where N is the number of inputs and outputs. The wavelength cross-connectors are used to connect together different nodes in the coupling system and are comprised of two different passive components: optical circulators and fiber gratings. A 2x2 wavelength cross-connector is formed by two circulators that are connected together through the medium of a fiber grating connected to the intermediate ports of the circulators. To construct a 4x4 wavelength cross-connector, two 2x2 wavelength cross-connectors are used, wherein the outputs of the 2x2 wavelength cross-connectors are connected together in pairs by means of circulator-pairs and a fiber grating. The fiber gratings reflect certain of the wavelength channels in the input signals delivered to the inputs and transmit remaining wavelength channels, thereby enabling each node to communicate with each other node. This enables wavelength cross-connectors having N inputs and N outputs to be built-up. |
