A cabling system represents the highway that carries your information. It is the foundation of your networking strategy. You may have the best components, active and passive devices, and software, but if you are not exchanging on-time error-free information, you’re headed for disaster. A good cabling infrastructure can make all the difference for your business. To make such value-added propositions, cabling system installers strive to propose and design high performance channels. Marketing strategies are structured around performance reporting. Moreover, the performance of today’s Cabling systems must be compatible with tomorrow’s active equipment needs.

At NBEC, we combine experience and value-added engineering to provide the planning, design, project management, installation and maintenance of communications cable infrastructures for customers requiring multi-site rollouts and/or single-site installation. We offer complete Fiber & Structured cabling solutions available in the market.

FIBER OPTIC SPLICING AND TESTING

Fiber optic cable fusion splicing provides the lowest-loss connection. Special equipment called fusion splicer is used to perform the fiber fusion splicing. The fusion splicer performs optical fiber fusion splicing in two steps.

Precisely aligning the two fibers generates a small electric arc to melt the fibers and weld them together.

NBEC has its own fusion High precision splicing machines Fujikura 60s. Our trained fiber splicing technician can routinely achieve less than 0.1dB insertion loss splicing for both single mode and multimode fiber cables.

FIBER OPTIC SPLICING PROCEDURE

FIBER OPTIC CABLE SPLICING

Two optical fiber splicing methods are available for permanent joining of two optical fibers. Both methods provide much lower insertion loss compared to fiber connectors.

• Fiber optic cable fusion splicing – Insertion loss < 0.1dB
• Fiber mechanical splicing – Insertion loss < 0.5dB
• NBEC always uses Fusion splicing.

FUSION SPLICING

Fiber optic cable fusion splicing provides the lowest-loss connection. Special equipment called fusion splicer is used to perform the fiber fusion splicing. The fusion splicer performs optical fiber fusion splicing in two steps. Precisely align the two fibers Generate a small electric arc to melt the fibers and weld them together. High precision fusion fiber splicing can routinely achieve less than 0.1dB insertion loss splicing for both single mode and multimode fiber cables.

 FIBER OPTIC CABLE SPLICING WITH ARC FUSION SPLICER

After the cables are installed and terminated, it's time for testing. For every fiber optic cable plant, we need to test for continuity, end - to - end loss and then troubleshoot the problems. Long outside plant cable with intermediate splices will require to verify the individual splices with an OTDR, since that's the only way to make sure that each one is good. Power meter testing is the measurement of loss that tells whether the system is operating properly.

MEASURING POWER

Power in a fiber optic system is like voltage in an electrical circuit - it's what makes things happen! It’s important to have enough power, but not too much. Too little power and the receiver may not be able to distinguish the signal from noise; too much power overloads the receiver and causes errors too.

Measuring power requires only power. meter (most come with a screw - on adapter that matches the connect or be in g tested) and a little help from the network electronics to turn on the transmitter. When measuring power, the meters must be set to the proper range. (Usually dB m, sometimes microwatts, but never "dB” that' s a relative power range used. only for testing loss ! ) and the proper wavelengths matching the source be i n g used. To measure power, attach the meter to the cab l e that has the output you want to measure. That can be at the receiver to measure receiver power, or to a reference test cable (tested and known to be good) that is attached to the transmitter, acting as the "source", to measure transmitter power. Turn on the transmitter/source and note the power the meter measures. Compare it to the specified power for the system and make sure it’s enough power but not too much.

OTDR TESTING

OTDR s are used on OSP cables to verify the loss of each splice. But they are also us e d as troubleshooting tools.

Unlike sources and power meters which measure the loss of the fiber optic cable plant directly, the OTDR works indirectly. The source and meter duplicate the transmitter and receiver of the fiber optic transmission link, so the measurement correlates well with actual system loss.

The OT DR, however, uses backscattered light of the fib e r to imply loss. The OT DR works like RADA R, sending a high-power laser light pulse down the fiber and looking for return signals from back scattered light in the fiber itself or reflected light from connector or splice interfaces.

At any point in time, the light the OTDR sees is the light scattered from the pulse passing through a region of the fiber. Only a small amount of light is scattered back toward the OTDR , but with sensitive receivers and sig n a l averaging, it is possible to make measurements over relatively long distances. Since it is possible to calibrate the speed of the pulse as it passes down the fiber, the OT DR can measure time, calculate the pulse position in the fiber and correlate what it sees in back scattered light with an actual location in the fiber. Thus, it can create a display of the amount of back scattered light at any point in the fiber.

Since the pulse is attenuated in the fiber as it passes along the fiber and suffers loss in connectors and splices, the amount of power in the test pulse decreases as it passes along the fiber in the cable plant under test.

The limited distance resolution of the OT DR makes it very hard for us e in a LA N or building environment where cables are usually only a few hundred meters long. The OT D R has a great deal of difficulty resolving features in the short cables of a LAN and is likely to show “ghost s “ from reflection s at connectors, more often than not simply confusing the user.