Ciena

About: Ciena is a company organization based out in Hanover, Maryland, United States. It is known for research contribution in the topics: Signal & Node (networking). The organization has 1259 authors who have published 1557 publications receiving 25989 citations.

Fiber-Bragg-grating-based strain measuring apparatus, system and method

Abstract: The invention was originally developed to determine the strain-relief capability of a fusion splice protector as well as the compressive stress imparted to a fusion splice by the splice protector. The invention also permits performance and comparative analyses of splice protectors as well as any package in which the optical fiber is at least partially disposed. To those ends a fiber Bragg grating (FBG) is axially arranged relative to the package such that a free or reference section of the FBG protrudes from the package while a shielded section lies within the package. Broadband light is supplied to the FBG which reflects certain wavelengths that are measured by an optical spectrum analyzer. The FBG reflected spectra will be split into two peaks as the reference and shielded sections experience different amounts or types of stress thereby providing a powerful analysis tool. A wavelength shift in the reflected spectra reveals the amount of stress experienced by the reference and free sections and permits a qualitative and quantitative analysis of the stress applied by the package and the package's ability to protect fiber from stress (e.g. such as that imposed by a tension pull test). Measurements may be made after a variety of conditions are changed such as splice protector curing, axial tension application, axial tension release, time, and age accelerating environments. Comparative studies and various other calculations may also be performed to evaluate different packages.

Fiber optic cable management system

Abstract: One or more fiber optic cable management systems provided with an optical communications housing for managing and routing fiber optic cables. Each fiber optic cable management system includes a series of saddle brackets, and a channel for routing and separating matrix fiber optic cables from customer fiber optic cables. Each saddle bracket is capable of routing customer fiber optic cables in multiple directions without bending the customer cables beyond their minimum bend radii. As many saddle brackets as practical are provided in the fiber optic cable management system. Providing a multitude of saddle brackets allows the slack in the customer fiber optic cables to be distributed across more brackets, and allows each saddle bracket to be shorter. Shorter saddle brackets, in turn, increases hand space for a technician to manipulate and route the customer fiber optic cables.

Scalable abstraction of topology across domain boundaries

Abstract: Methods and systems are disclosed for scalable advertising of an abstracted form of an arbitrary network of nodes and links to external nodes or networks. One or more phantom hub nodes can be used that are connected to at least one node, forming one or more virtual network topology representing the internal connectivity of the network.

Byte-interleaving systems and methods for 100G optical transport enabling multi-level optical transmission

Abstract: The present invention provides byte-interleaving systems and methods for Optical Transport Unit N (OTUN) (i.e. Optical Transport Unit 4 (OTU4)) and 100 Gb/s (100 G) optical transport enabling multi-level optical transmission. The byte-interleaving systems and methods of the present invention support the multiplexing of sub-rate clients, such as 10 Gb/s (10 G) clients, 40 Gb/s (40 G) clients, etc., into two 50 Gb/s (50 G) logical flows, for example, that can be forward error correction (FEC) encoded and carried on a single wavelength to provide useful, efficient, and cost-effective 100 G optical transport today. Signaling format support allows these two 50 G logical flows to be forward compatible with an evolving OTU4 and 100 G signaling format without waiting for optical and electronic technology advancement. Signaling format support also allows an evolving standard 100 G logical flow (i.e. OTU4, 100 Gb/s Ethernet (100 GbE), etc.) to be carried as 2×50 G logical flows, 4×25 G logical flows, or other lower rate formats on a single wavelength.

Fiber optic cables management and measurement apparatus

Abstract: An apparatus for managing and measuring fiber optic cable includes a mounting base for receiving and retaining a variety of fiber cassettes capable of holding optical components having fiber optic cables emanating therefrom. The apparatus includes a pair of interchangeable marking mandrels spaced from the fiber cassette and having circumferences that exceed the minimum bend radius of the fiber optic cables. Each marking mandrel has marking grooves formed on its periphery so that the fiber optic cable may be marked at a predetermined location for future splicing of the cable. The apparatus further includes fiber take up mandrels connected to the mounting base, each fiber take up mandrel having a circumference that exceeds the minimum bend radius of the fiber optic cables. The marked fiber optic cables may be temporarily wound around the circumference of the fiber take up mandrels to prevent entanglement and keep the fiber out of the operator's way while another cable is being marked. The apparatus also includes a pair of fiber retainer rails interposed between the fiber cassette and the fiber take up mandrels for guiding the fiber optic cable from the fiber cassette to the fiber take up mandrels. Each of the fiber retainer rails has a resilient rail portion that protects the fiber optic cables from damage.