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Fiber Optic

Latency in Optical Fibers

Optical Fiber Latency: An optical fiber consists of a cylindrical core of silicon dioxide (fused silica glass) surrounded by a cladding. The core and cladding comprise the optical transmission media (or optical waveguide) and are usually coated for protection. Latency in optical transmission media is a consequence of limited velocity in the optical media. To […]

Fiber Optic 19 April 2017

Contributors of Latency in a Fiber Optic System

Fiber optic latency: In an optical fiber system, there are a minimum of five latency contributions. Two are created as the signal moves from the electrical domain to the optical; another contribution occurs as the signal travels down the optical fiber; and two more are created as the signal is converted from the optical domain […]

Fiber Optic 12 April 2017

The Network Operating Costs of Fiber Cable Management Systems

Fiber Network Operating Costs: As a means of keeping operational network costs down, service providers around the world are increasingly turning to systems integrators to install their networks. This practice allows the service provider’s technicians to focus on operations and maintenance, rather than network installation. There is, however, an inherent risk in this practice. As […]

Fiber Optic 30 November 2016

Fiber Cable Management Best Practices

Exploring Fiber Cable Management Best Practices: Rack Size and Rear Access The decision between 19- or 23-inch racks, ETSI racks or cabinets, as well as between front and rear Optical Distribution Frame (ODF) access or only front access, has implications for the operation and reliability of the ODF system. As a rule, the larger the […]

Fiber Optic 23 November 2016

Splicing Connectors: On-Frame and Off-Frame

Splicing Connectors The splicing of outside plant (OSP) fibers to connectorized pigtails, to allow termination panel access to the OSP fiber, can be done in two basic configurations: on-frame and off-frame. On-Frame Splicing On-frame splicing (See figure 1) is performed within the confines of the optical distribution frame (ODF), whereas off-frame splicing is done away […]

Fiber Optic 16 November 2016

Optical Distribution System Architecture: Cross-Connect

When configuring an optical distribution frame (ODF), one of the first considerations is the decision between interconnect and cross-connect systems. As with the location of optical components, this decision has large implications for the network’s future growth, reconfigurability, cost, and reliability. Cross-Connect Systems Architecture A cross-connect ODF architecture provides a dedicated termination point for both […]

Fiber Optic 9 November 2016

Optical Distribution System Architecture: Interconnect

When configuring an Optical Distribution Frame (ODF), one of the first considerations is the decision between interconnect and cross-connect architectures. As with the location of optical components, this decision has large implications for the network’s future growth, reconfigurability, cost and reliability. Interconnect Systems Architectures Interconnect involves the OSP cable being spliced to a pre-connectorized pigtail, […]

Fiber Optic 2 November 2016

Functional Requirements Of A Fiber Distribution System: Splicing

Splicing: Splicing in fiber optics is the physical joining of two separate optical fibers with the goal of having 100-percent signal transfer. Splicing connections are meant to be permanent, non-reconfigurable connections. There are two basic splicing methods in use today: mechanical and fusion (see Figure 1) below: [figure 1] Mechanical Splicing Mechanical splicing involves the […]

Fiber Optic 26 October 2016

The Importance of a Slack Storage System For Network Reliability

Overcoming Cable Management Problems with Storage: Most ODF systems encounter cable management problems in the storage of excess fiber cable. Since most singlemode connectors today are factory-terminated to a patch cord of a predetermined length, there is always some excess fiber remaining after the connections have been made. At some point during the life of […]

Fiber Optic 20 October 2016

Fiber Distribution Management System: Terminations

‘Connection determined by quality’ Let’s return now to the four basic functional requirements of any fiber distribution management system: terminations, splicing, slack storage, and housing of passive optical components. In order for the signal to get from one fiber to another, the cores of the two fibers need to be joined, and brought into near-perfect […]

Fiber Optic 12 October 2016