Abstract: Angular alignment of optical fibers for fiber optic ribbon cables and related methods are disclosed. Employing optical fibers disposed in a ribbon matrix can increase bandwidth between two interconnection points. In one embodiment, optical fibers are angularly aligned during the process of forming a fiber optic ribbon cable. To angularly align the optical fibers, each of the optical fibers include an angular alignment feature to facilitate uniform or substantially uniform angular orientation along a cable when the optical fibers are prepared to be disposed in the ribbon matrix to form a fiber optic ribbon cable. By purposefully aligning the optical fibers during formation of the fiber optic ribbon cable, end portions of the optical fibers are aligned in the ribbon matrix. Thus, end portions of the ribbon matrix are not required to be removed to expose and align the end portions of optical fibers when the ribbon cable is connectorized.

Abstract: Angular alignment of optical fibers for fiber optic ribbon cables and related methods are disclosed. Employing optical fibers disposed in a ribbon matrix can increase bandwidth between two interconnection points. In one embodiment, optical fibers are angularly aligned during the process of forming a fiber optic ribbon cable. To angularly align the optical fibers, each of the optical fibers include an angular alignment feature to facilitate uniform or substantially uniform angular orientation along a cable when the optical fibers are prepared to be disposed in the ribbon matrix to form a fiber optic ribbon cable. By purposefully aligning the optical fibers during formation of the fiber optic ribbon cable, end portions of the optical fibers are aligned in the ribbon matrix. Thus, end portions of the ribbon matrix are not required to be removed to expose and align the end portions of optical fibers when the ribbon cable is connectorized.

Abstract: An optical amplifier including a gain fiber, first and second sources of pump light for providing pump light through the gain fiber, first and second optical couplers coupling the first and second sources of pump light to different points along the gain fiber, and a cut-off filter coupled to one or the other of the first and second optical connections for preventing pump light generated by one of the sources from reflecting off the second of the sources and reentering the first source. The gain fiber also includes dopant atoms such as erbium. The cut-off filter is preferably one of a wavelength division multiplexer and an optical isolator.

Abstract: A wavelength selective optical cross-connect includes a first demultiplexor feeding into individually removable modules that in turn feed a first multiplexor, such that the cross-connect is expandable and repairable on a wavelength or waveband basis. The modules desirably include multiple optical components in the optical path, with components in each module matched to others in that module to provide module-to-module variation below that of the variation in module components. The modules desirably include an additional demultiplexor and multiplexor. The modules also desirably include wavelength or narrowband amplification together with power equalization. The modules may also include a switch fabric.